Fixes Bugzilla #1264.

Thanks to Gueniffey for the patch!

Fixes Bugzilla #1191.

This patch is based on work done by Vittorio Giovara.

Obtain the correct environment in a thread-safe way when appropriate instead.

Fixes Bugzilla #1312.

Thanks to Bill Chenbin for the patch!

We need this for GLES2 support.

Fixes Bugzilla #1290.

Thanks to Gabriel Jacobo for the patch!

--HG--
extra : rebase_source : 80bd6c922b4e9c74582cc85d62462d87431315bd

Fixes Bugzilla #1292.

Thanks to Vittorio Giovara for the patch!

This solves the problem that on iPad you would get 1024x768 instead
of 768x1024 when calling SDL_GetDesktopDisplayMode(0, &mode)
See Apple's doc for UIScreenMode where is says:
"Most developers should never need to use the information provided
 by this class and should simply use the bounds provided by the
 UIScreen object for their drawing space."

We need the C runtime, which we don't link against, for __try/__except.

--HG--
extra : rebase_source : ae532d4b4d68ef86de0fc2cb6794a622e0841bce

Do not exit in (uikit) postFinishLaunch but store the exit status and use that to return from main()

Also cleanup the stored argv in main() instead of postFinishLaunch.

This is the rakefile from Andrey Nesterov, but slightly modified.
Use the following command:
  $ rake -f Xcode-iPhoneOS/rakefile
The resulting framework is placed in the ./build directory.

For example:
* Opening bracket of a method/function on a new line at column 0
* space after "if", "while", etc

These comments are only useful for running indent which we are
probably not going to use in Objective-C context.

Removed checks for things that are always true, free unneeded struct before
 calling thread entry point, instead of after thread completes.