Conversion of webaccess HTML strings to UTF.
Removed illegal attribute language from HTML script tag.
Making XHTML valid to standard.
Changed doctype to HTML5 and adjusted the tags.
Webacces fix amount of bytes sent for utf8 strings.
Merge remote-tracking branch 'upstream/master' into webaccess-utf8
Syncing with master.
Webaccess: Reverted unnecessary toUTF calls.
RGBScript: load each script only once.

This speeds up workspace loading quite a lot.
small cleanup
VCMatrix: implemented external input/key bindings of custom controls
VCMatrix: sort controls by ID to keep their creation order
Improved Qt5 OSX bundle

Multimedia still not working though :(
OSX: Fixed Qt5 audio playback !

The workaround is ridiculous and has no explanation at all
VideoEditor: fixed empty video information
New fixture: Eurolite LED SLS-180 RGB (thanks to Peter)

New fixture: Futurelight PHW-260 (thanks to Alessandro Grechi)
Refactoring: move QLCInputChannel::Type to icon conversion
Merge pull request #371 from plugz/speedup-rgbscriptload

Speedup rgbscript loading
Updated changelog with David's changes
Merge pull request #370 from Babbsdrebbler/webaccess-utf8

Webaccess UTF and HTML5 enhancement