|MERGE|
system_file -> unstable
|MERGE|
renderer_text -> unstable
|SOURCE|
[Common::System::Time]
* GetBeatTime added to retrieve the current time as .beat time
* Added BEAT_TIME struct to store the beats and centibeats
[Linux::System::Time]
* GetBeatTime caclculates the .beat time using UTC+1 from the time and gmtime
  functions
Merge remote-tracking branch 'origin/unstable' into renderer_text
|SOURCE|
[Common::Renderer::OGL::GLExtender]
* Added zglBlendFuncSeparate and zglBlendEquationSeparate
[Common::Renderer::OGL::GLFont]
* Removed the unused shader member variables
* When each glyph is being rendered, alpha blending is enabled (though, this
  isn't for any non-transparent fonts)