Support for extra keys such as Ctrl, Alt, Tab and Esc on mobile devices

Conflicts:
	include/ui.js
	vnc.html

Allow higher frame rates by using a new approach for framebufferUpdate requests

    * changed the type of the input field (which is used for bringing up the
      on-screen keyboards on touch devices) from email to text
    * when typing in an input field of type email the user is not allowed to
      write parentheses on iOS devices, the keys are disabled.
    * tested on iOS 6, iOS 7 and Android 4.3.

Enables local cursor by default

The https check should come first.

Autoconnect option as URL query

Fixes the onscreen keyboard in Chrome on Android

A similar change was made to ui.js in #252.

* 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.

Rfb js fixes

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

Fix to onMouseDisable

consistant behavior across different browsers.

Allow for double taps to trigger double clicks even if the second touch is a slight bit off

Fixed so that viewportDrag works even if no mouse button is selected.

framebufferUpdate request at a time.

Improved use of screen real estate

Display the desktop name in the document title

  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.