This commit converts the send queue to use typed arrays, and converts
message creation functions in 'rfb.js' to create messages directly into
the socket's send queue.  This commit also removes the separate mouse array,
which is no longer needed.

Creating lots of small objects frequently can drastically decrease
performance.  This commit introduces three fixes which avoid this:

- Use a preallocated palette and indexed-to-rgb destination Typed Array
  (the destination typed array is currently allocated at `4 * width *
  height`).

- Inline `getTightCLength`, which returned a two-item array.

- Pass RGBX data directly in a Typed Array to the Display, which
  avoids an extra loop, and only creates a new Typed Array View,
  instead of a whole new ArrayBuffer.

**This commit removes Base64 (and Flash) support**

This commit converts websock.js to used Typed Arrays for the
receive queue (and tweaks rfb.js to ensure that it continues
to function, since only Firefox implements
`%TypedArray%.prototype.slice`).  Base64 support was removed
to simplify code paths, and pave the way for using Typed Arrays
for the send queue as well.

This provides two advantages: first, we allocate a buffer ahead
of time, meaning the browser doesn't have to do any work dynamically
increasing the receive queue size.  Secondly, we are now able to pass
around Typed Array Views (e.g. `Uint8Array`), which are lightweight, and
don't involve copying.

The downside is that we initially allocate more memory -- we currently
start out with 4 MiB, and then automatically double when it looks like
the amount unused is getting to small.

The commit also explicitly adds a check to the compacting logic that
avoids calling the copy functions if `_rQlen === _rQi`.

This commit removes a nested loop in indexedToRGB, converting it into a
plain loop without multiplication.

This commit introduces an alternate implementation of the zlib
decompressor based on Pako (https://github.com/nodeca/pako).

This fixes a couple of JSHint errors in RFB.js caused
by using `==` instead of `===`.

This commit fixes vnc_playback.html and playback.js
so that they work with the current version of noVNC.

This commit switches the Travis tests over to Travis's new
container-based infrastructure.  It also tells Travis to
cache the node_modules directory for faster setup.

Add option to toggle fullscreen mode

  keyboard input doesn't work in fullscreen.
* Force clipping mode in Internet Explorer while in fullscreen since
  scrollbars doesn't work in fullscreen.

which kept track on if it was open or not (it automatically closes after
1.5 seconds anyway).

moved it to where the other clipping functions are.

* Fixes #502 so that the viewport drag functionality can't get stuck

"jumping around". Enable/disable the button instead of show/hide on these
devices.

Fixed incorrect UI usage and minor updateState params errors in vnc_auto.html

Reverting most of commit cb3e4deb. The issue was not related to using keyboardinputReset.. the issue was infact a typo which was introduced in 3b8ec46f. I must be too tired..

* This fixes backspace when using the on-screen keyboard on Android

Removed old no longer existing vnc.js and added playback.js

Make noVNC compatible with Content Security Policies

* Disable local cursor when the browser doesn't support data uri

slip in PATH for 'npm test' as not everyone has karma

Throw exceptions from RFB constructor

Follow symbolic links in launch.sh

Previously, if an error was thrown from the Display constructor
in the RFB constructor, we would attempt to use `RFB#updateState`
to handle this.  However, `RFB#updateState` attempts to close
the WebSocket connection, which doesn't exist at this point.

In the constructor, it's probably just better to raise an exception
instead (making sure to clean up anything relevant).

Fixes #460

In e543525f, we switched to creating
a new RFB object on disconnect.  This caused issues, however, since
any errors were only displayed briefly before the new "loaded" text
was displayed instead.

Now, we create the RFB object on connect.  This essentially removes
the usefulness of the "loaded" state, but prevents the aforementioned
problem.

To facilitate this, the code which does detection of cursor URI support
was moved from this Display constructor (which now calls the new
function) into its own function, `Util.browserSupportsCursorURIs()`.

Fixes #467

Previously, in launch.sh, `$HERE` was the directory of `$0`.
However, if `$0` was actually a symlink, `$HERE` would be
wherever the symlink was, which could cause issues (for
example, the script wouldn't be able to local `$WEB` or
`$WEBSOCKIFY` properly).

Now, `$HERE` looks at whatever `$0` points at instead.

Closes #447.

Fix resize in Firefox on Android

* Renamed and reworked fbuClip to clippingDisplay
* Added tests for clippingDisplay
* Use the a noVNC_container which covers the entire page to get the full size
  (Fixes #463)
* Added maxWidth and maxHeight to the canvas which can limit the viewport size
* Only show either the canvas or the logo, hide one when the other is shown
* Always center the canvas (previously it was only centered when not clipping)
* Removed iOS specific "position-fixed" fixes and start calling setBarPosition
  on every resize
* Removed the noVNC_screen_pad

* Added better error handling in ExtendedDesktopSize
* Added helper function to share code with DesktopSize
* Update test.rfb.js to only check for error handling if we were the
  ones requesting the resize

Make the touch-keyboard code more robust through verifying that global variables are set before use.

Introduce Local Autoscaling

This commit adds two new addition scaling options.  Both options do
local scaling.  The first "Local Scaling", does both upscaling and
downscaling.  The second option, "Local Downscaling", only downscales.

This is based on work by @mightypenguin (with an additional bug
reported by @glazik12).

This commit updates the UI to allow for different
scaling modes.  The "resize" option was changed to
be a dropdown with the following options: "None" (nothing),
"Remote Resizing" (SetDesktopSize).