Move display capture texture update to video_tick
Move display stream update handler logic out of init_display_stream
Reduce lock holding time for display stream and guarantee update

With the previous locking strategy some display captures would sometimes
not process multiple frames in a row if multiple display captures were
active
Add log message for dropped display stream frames
Basic UI:  Fix scene/source reference counter

The 'how many scenes is this source in' reference counter used
in the basic UI was not being decremented.
Added a version to the X11 GL context request

This enables the application to start on Intel graphics under Mesa 10.2
Merge pull request #84 from mcgrew/intel-fix

Added a version to the X11 GL context request
Improved settings usability.

Don't ask user to save changes every item switch.
Apply button greyed out when there are no changes.
Advise user he needs a scene before adding a source.
Auto suggest scene and source names.

NameDialog can have placeholder text.
Localize scene number.
Pre-select scene and source text.
Merge pull request #82 from Socapex/master

Small usability enhancements.
Add offset to xcursor

This patch adds the option to specify an offset for the cursor position.

Small fix to texture format aswell.
Add support for multi-screen setups

This patch adds support for multi-screen setups by using xinerama
information if available to determine the screen size and position.

In case xinerama is not available or not active it uses the information
provided for the x screen.

To clean up the code some generic helper functions were moved to a
separate source file.
Add README for the xshm plugin

The file contains some development information specific to the plugin.