Instead of defining a hacked up Common::Error code, split the return
value of processSettings into two parts: An error code, and a value
which indicates whether the specified command was completely handled
by processSettings or not.
- Renamed base/options.cpp to base/commandLine.cpp because of conflict
with gui/options.cpp which sit in same directory in MSVC builds
- Moved AudioCDManager singleton declaration outside of Audio namespace
- Fixed numerous MSVC warning of potentially uninitialized variables and
int <-> bool conversions.
svn-id: r22397
