Initial texture memory budgeting code. Restructured texture resizing. Enabled the texture resolution setting to actually work.
Fix Windows build for Ogre 1.9.
Fixed UI overlays not showing up with Ogre 1.9.
Read texture budget from config.
Allow adjusting texture budget from renderer settings.
Merge branch 'tundra2' into ogre1.9
Fix the Ogre InputContext.h include file clash in FindOgre macros instead of code.
Checkout default ogre-safe-nocrashes branch.
Merge branch 'tundra2' into ogre1.9
Check out Ogre 1.9 branch in deps build scripts.
Fixed Linux build with Ogre 1.9
Initial fixes for building Ogre 1.9 on OSX.
Fix Ogre linking and deploying Ogre frameworks on OSX. Updated OSX build docs.
Improved the texture budgeting code to take into account the texture being currently loaded. Increased default texture budget to 512MB.
Always rerun Ogre's CMake to support changing build type better.
Merge branch 'tundra2' into ogre1.9

Conflicts:
	src/Core/OgreRenderingModule/TextureAsset.cpp
Fix TextureAsset command line options into lowerCamelCase format.
More informative debug messages in TextureAsset::ProcessDDSImage. Do not log error if a DDS image contains something else than DXT compressed data.
HttpAssetProvider: Move cache file disk write (on the first download if last modified is used and available) out of the main thread via QThreaPool. This is implemented in the provider as it handles the write currently and makes AssetAPI skip its store. If this would be implemented for all providers in AssetAPI it would require some changes to the load flow (although minor and doable it makes more sense to leave the provider handle this).
HttpAssetProvider: Make this provider queue completed transfers and feed them to AssetAPI based on how much time they spent for the remaining loading time. This logic breaks once transfers have been served for 16msecs during a mainloop frame, logic is exactly the same as for LocalAssetProvider. Implemented threshold by size logic to perform cache write in the main thread. This logic is currently disabled by making the threshold 0 (everything async) but is there for easier debugging for profiling reasons. As noted in the pull request discussion even opening a file can block big time even if the write operation would be quick etc.
HttpAssetProvider: Make HTTPASSETPROVIDER_NO_HTTP_IF_MODIFIED_SINCE logic use the same completedTransfers list for sending the tranfer to AssetAPI. Cleans up the .h file nicely.