ZenGL 0.2.1

This is the first bugfix release in 0.2.x branch, which will be supported till next major stable release Also there was started wiki and ZenGL(0.3.x branch in svn) now can work on Windows Mobile even with OpenGL ES 1.0(thanks to Vad for testing and help)!

Changelog:
- [Direct3D]slightly optimized render
- now ZenGL will check for GL_EXT_texture_filter_anisotropic for using anisotropic filtering
- fixed snd_LoadFromMemory
- now closing the application will reset all states and so on
- LOG_FILE can be gotten only before execution zgl_Init
- fixed col2d_RectVsCircle and col2d_RectInCircle
- fixed Unicode text input when application compiled by Delphi 2009+

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