Added dummy os::Byteswap methods to prevent implicit byte swapping on char types.
Updated meshviewer config.xml to include PLY files, also removed the statement that the combo box has no function as it has worked for some time. 
Fixed some comments in CNullDriver.cpp.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@2262 dfc29bdd-3216-0410-991c-e03cc46cb475