remove unused CMake files for Audiere, MPG123 and Sndfile
remove references to Audiere and MPG123 from top-level CMake file
remove Audiere and MPG123+Sndfile decoder sources
remove audiere_decoder + mpgsnd_decoder from CMake file for openmw
Added custom spin box class
Implemented rangeview with spinbox as only control.  Simplified setting
class constructor.
Merge branch 'master' of https://github.com/OpenMW/openmw
merge
Commented out "proxy selection test" demo page in user settings
Commented out "proxy selection test" demo page in user settings
Merge branch 'master' of https://github.com/graffy76/openmw
fixed conflict

Conflicts:
	apps/opencs/model/settings/usersettings.cpp
Implemented slider widget in rangeView class
implemented QDial into RangeView class
Merge remote-tracking branch 'graffy76/master'