Compiles with ogl-es 1.x again

git-svn-id: http://irrlicht.svn.sourceforge.net/svnroot/irrlicht/branches/ogl-es/@4499 dfc29bdd-3216-0410-991c-e03cc46cb475
Also fix compilation for ogl-es 2.

git-svn-id: http://irrlicht.svn.sourceforge.net/svnroot/irrlicht/branches/ogl-es/@4501 dfc29bdd-3216-0410-991c-e03cc46cb475
Remove unused PostRender method, wich was used by the old ogl-es2 driver.

git-svn-id: http://irrlicht.svn.sourceforge.net/svnroot/irrlicht/branches/ogl-es/@4504 dfc29bdd-3216-0410-991c-e03cc46cb475
Remove unused shader callback methods onsetattributes and onunsetattributes.

git-svn-id: http://irrlicht.svn.sourceforge.net/svnroot/irrlicht/branches/ogl-es/@4505 dfc29bdd-3216-0410-991c-e03cc46cb475
- Fixed OGL ES2.x issues related to last updates of branch.
- Added OGL ES 1.x and 2.x drivers to VS2012 project.

git-svn-id: http://irrlicht.svn.sourceforge.net/svnroot/irrlicht/branches/ogl-es/@4506 dfc29bdd-3216-0410-991c-e03cc46cb475
- Fixed OSX compilation issues (both trunk and ogl-es branches).

git-svn-id: http://irrlicht.svn.sourceforge.net/svnroot/irrlicht/branches/ogl-es/@4508 dfc29bdd-3216-0410-991c-e03cc46cb475
- Fixed iOS compilation issues.

git-svn-id: http://irrlicht.svn.sourceforge.net/svnroot/irrlicht/branches/ogl-es/@4509 dfc29bdd-3216-0410-991c-e03cc46cb475
Merge from trunk, revisions 4495-4510. Mostly whitespace and indentation fixes; mipmap fixes

git-svn-id: http://irrlicht.svn.sourceforge.net/svnroot/irrlicht/branches/ogl-es/@4511 dfc29bdd-3216-0410-991c-e03cc46cb475
- Fixed Android compilation issues. Thanks to mchiasson for prepare this patch.

git-svn-id: http://irrlicht.svn.sourceforge.net/svnroot/irrlicht/branches/ogl-es/@4512 dfc29bdd-3216-0410-991c-e03cc46cb475
- Added official example for iOS (both iPhone and iPad devices are supported).

git-svn-id: http://svn.code.sf.net/p/irrlicht/code/branches/ogl-es/@4516 dfc29bdd-3216-0410-991c-e03cc46cb475
Memory cleanup fix by Luong Cong Dan

git-svn-id: http://svn.code.sf.net/p/irrlicht/code/branches/ogl-es/@4517 dfc29bdd-3216-0410-991c-e03cc46cb475
- Fixed issues with transparent materials in OpenGL ES 2.0 driver.

git-svn-id: http://svn.code.sf.net/p/irrlicht/code/branches/ogl-es/@4518 dfc29bdd-3216-0410-991c-e03cc46cb475
- Improved Android build system and fix minor issues in sources.

git-svn-id: http://svn.code.sf.net/p/irrlicht/code/branches/ogl-es/@4522 dfc29bdd-3216-0410-991c-e03cc46cb475
Add check for APPLE_BGRA8888 extension

git-svn-id: http://svn.code.sf.net/p/irrlicht/code/branches/ogl-es/@4523 dfc29bdd-3216-0410-991c-e03cc46cb475