Updated version to 2.0.0
Fixed bug 1833 - Memory leak issue in SDL_mixer-1.2.12/music.c file

Nitz

In this code 'music' is dynamically allocated. But memory get leaked at return MUS_NONE.
Cleaned up whitespace for the 2.0.0 release
Renamed documentation files to .txt and converted them to DOS line endings so they would open properly on all systems.

--HG--
rename : CHANGES => CHANGES.txt
rename : COPYING => COPYING.txt
rename : README => README.txt