Fixed unicode support.
More unicode fixes.

Fixed more unicode stuff I missed the first time around.
Merge pull request #18 from prettyv/master

fix compilation on gcc 4.7
Fixed compilation on non-Windows platforms.
Fixed a compile error and a crash bug.

Fixed a compile error in cPluginManager.cpp.
Fixed a crash bug in cAudioManager.cpp.  The iterator was becoming
invalid as dropping an audio source was removing it from the vector
being iterated through.
Merge pull request #20 from LoneBoco/master

Fixed unicode support and minor crash.