Merge rev. 1524:1721 from trunk in order to get latest initialisation code and feature support for ogl-es driver.

git-svn-id: http://irrlicht.svn.sourceforge.net/svnroot/irrlicht/branches/ogl-es/@1722 dfc29bdd-3216-0410-991c-e03cc46cb475
A compilable version of the ogl-es1 driver.

git-svn-id: http://irrlicht.svn.sourceforge.net/svnroot/irrlicht/branches/ogl-es/@1727 dfc29bdd-3216-0410-991c-e03cc46cb475
Wrong texture type fixed. Support for emulator with MSVC added.

git-svn-id: http://irrlicht.svn.sourceforge.net/svnroot/irrlicht/branches/ogl-es/@1728 dfc29bdd-3216-0410-991c-e03cc46cb475
Minor fixes for the ogl-es driver

git-svn-id: http://irrlicht.svn.sourceforge.net/svnroot/irrlicht/branches/ogl-es/@1729 dfc29bdd-3216-0410-991c-e03cc46cb475
Fix Linux support for ogl-es.

git-svn-id: http://irrlicht.svn.sourceforge.net/svnroot/irrlicht/branches/ogl-es/@1730 dfc29bdd-3216-0410-991c-e03cc46cb475
Added some OGLES extension support. With the IMG_BGRA8888 extension colors are fixed now.

git-svn-id: http://irrlicht.svn.sourceforge.net/svnroot/irrlicht/branches/ogl-es/@1845 dfc29bdd-3216-0410-991c-e03cc46cb475
Fix order and missing extensions.

git-svn-id: http://irrlicht.svn.sourceforge.net/svnroot/irrlicht/branches/ogl-es/@1846 dfc29bdd-3216-0410-991c-e03cc46cb475
Enable point sprites and optimize screenshot.

git-svn-id: http://irrlicht.svn.sourceforge.net/svnroot/irrlicht/branches/ogl-es/@1847 dfc29bdd-3216-0410-991c-e03cc46cb475
Fixed typo in ogl-es extension names.

git-svn-id: http://irrlicht.svn.sourceforge.net/svnroot/irrlicht/branches/ogl-es/@1848 dfc29bdd-3216-0410-991c-e03cc46cb475
Enable the texture based RTT

git-svn-id: http://irrlicht.svn.sourceforge.net/svnroot/irrlicht/branches/ogl-es/@1849 dfc29bdd-3216-0410-991c-e03cc46cb475
Add new extension handler file

git-svn-id: http://irrlicht.svn.sourceforge.net/svnroot/irrlicht/branches/ogl-es/@1852 dfc29bdd-3216-0410-991c-e03cc46cb475
Merged revisions 1726:1852 from trunk for the recent updates.

git-svn-id: http://irrlicht.svn.sourceforge.net/svnroot/irrlicht/branches/ogl-es/@1853 dfc29bdd-3216-0410-991c-e03cc46cb475
Fix another point_sprite define and enable AllowZWriteOnTransparent also for ogl-es.

git-svn-id: http://irrlicht.svn.sourceforge.net/svnroot/irrlicht/branches/ogl-es/@1855 dfc29bdd-3216-0410-991c-e03cc46cb475
iPhone fixes, submitted by tonic and Adversus.

git-svn-id: http://irrlicht.svn.sourceforge.net/svnroot/irrlicht/branches/ogl-es/@1960 dfc29bdd-3216-0410-991c-e03cc46cb475
Added missing and new files to project file

git-svn-id: http://irrlicht.svn.sourceforge.net/svnroot/irrlicht/branches/ogl-es/@1971 dfc29bdd-3216-0410-991c-e03cc46cb475
Added separate extension handler file with some new functions. Moved code from the header file there.

git-svn-id: http://irrlicht.svn.sourceforge.net/svnroot/irrlicht/branches/ogl-es/@1972 dfc29bdd-3216-0410-991c-e03cc46cb475
Merged all revisions up to 1976 from trunk into ogl-es branch.

git-svn-id: http://irrlicht.svn.sourceforge.net/svnroot/irrlicht/branches/ogl-es/@1977 dfc29bdd-3216-0410-991c-e03cc46cb475
Compile fix by grafikrobot
Added some things for FBO integration, not yet finished.

git-svn-id: http://irrlicht.svn.sourceforge.net/svnroot/irrlicht/branches/ogl-es/@1982 dfc29bdd-3216-0410-991c-e03cc46cb475
Copied FBO support from OpenGL driver to ogles driver. Not yet tested due to lack of support in emulator.
Added initial ogl-es extension support with function pointers. Not yet working due to pointer problems...

git-svn-id: http://irrlicht.svn.sourceforge.net/svnroot/irrlicht/branches/ogl-es/@1983 dfc29bdd-3216-0410-991c-e03cc46cb475
Add and comment the ogl-es extension define. Make opengl and ogl-es mutually exclusive by default.

git-svn-id: http://irrlicht.svn.sourceforge.net/svnroot/irrlicht/branches/ogl-es/@2015 dfc29bdd-3216-0410-991c-e03cc46cb475