implemented config loading from ini files

with the parameter --config:<path2configfile> a custom config can be defined
fixed PropertyManager

If no username or sessionid is given, only
globale config will be searched instead of an error
fixed get functions in stores
freerds: improve xorg-server build scripts
x11rdp: add logging for randr
x11rdp: add randr 1.4 callbacks
Merge remote-tracking branch 'awakecoding/master'