Apparently Firefox on Linux changed the value of navigator.appVersion,
causing our OS detection (used to determine how to interpret different
modifier keys) to fail.

Use navigator.platform instead, which should be more stable.

http://stackoverflow.com/a/19883965/33213

Previously we identified keys in keyboard events by the 'key' property
if it was set, and 'keyCode' otherwise.

This turns out to be problematic as Firefox no longer leaves 'key'
undefined (so we fall back to using 'keyCode'), but instead sets 'key'
to 'MozPrintableKey' for all printable keys.

This meant that when (printable) keys are released, we can't match it
against the corresponding keydown event, and instead just send a keyup
event for the last keydown received.

Now, if both 'key' and 'keyCode' are set, use the concatenation of both.
Otherwise prefer 'keyCode', as that is at least unique for every key.

This should let us release the right keys on keyup events.

When shortcut modifiers (modifier keys such as CTRL, which do not participate in
composing character input) are pressed, we try to suppress the keypress
event, as browsers do not reliably generate it. This means that
subsequent key events are decoded only based on the keydown event.

Due to a type error (comparing a string to a number), shift was
mistakenly treated as a shortcut modifier, preventing text input which
relied on shift, such as _ and %, from being generated.

Keyboard Handling [8/8]: Introduce substituteCodepoint() to replace code points which don't have a keysym with ones that do

For now, the only code points this is done for are {s, S, t, T} with comma below (used in Romanian),
 which are replaced by {s, S, t, T} Cedilla.

Regenerate the keysymdef table without -d.

This eliminates keysym names, which are only used for debugging, and shaves ~40kb off the file size

This allows the keyboard handler to check modifier key state much more frequently

Since some browsers never send keyup events for modifier keys, we have to
synchronize modifier state whenever we get a mouse or keyboard event

Plug new keyboard handling into input.js (which breaks everything else), and update input.html to work with this

Add keyboard.js, containing the actual keyboard event parsing code.

Add a node.js-based tool (utils/parse.js) to read keysymdef.h and produce a JavaScript file
mapping Unicode code points to keysyms.

Also add the generated table (include/keysymdef.js).

This patch adds support for the secure attribute on token
cookies (sent by nova-novncproxy). If the https is used
to transfer the cookie, the secure attribute is set thus
restricting server requestes to secure conections only.
This should prevent man-in-the-middle attacks.

* The list is found in /usr/include/X11/keysymdef.h
* I did only include the most common symbols for now..

* Added a few clarifying comments.

We create timeouts, not intervals. Then we need to clear them with
clearTimeout.

consistant behavior across different browsers.

framebufferUpdate request at a time.

  button group instead of centered.
* On low resolution devices the padding towards the edges of the screen of
  the left and right button groups are now removed.
* Since the status_bar was merged into the control-bar the actual status_bar
  element became redundant and was therefor removed.
* Improved the style of the control-bar when there is an error or a warning.
* Implemented a fix so that vnc_auto.html works as intended with the improved
  screen real estate patch.

* The trigger distance now takes devicePixelRatio into account.