Fixes crash from r15715 where a VBChunk* was released but not set to NULL

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@15721 3db68df2-c116-0410-a063-a993310a9797
Merge 'remotes/trunk'
update the in-game hotkeys page following r15671

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@15722 3db68df2-c116-0410-a063-a993310a9797
Some tweaks to profiler2:
* separate the HTTP profiling server from the on-screen profiler
* allow shutting down the HTTP profiler
* print messages when enabling/disabling HTTP and GPU profilers

Patch by kingbasil, fixes #1862

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@15723 3db68df2-c116-0410-a063-a993310a9797
Automated build.

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@15724 3db68df2-c116-0410-a063-a993310a9797
Sets default compiler for OS X build to clang, using hack that should be replaced if we upgrade premake.
Fixes linking error in ICU build from build-osx-libs.sh (it was setting the C++ compiler to clang, which is the C compiler, so it wouldn't automatically link to the c++ lib). Now build-osx-libs.sh and the game should use clang and whichever c++ lib is the default

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@15725 3db68df2-c116-0410-a063-a993310a9797
Fixes clang warning of deprecated finite function in FCollada on OS X 10.9, patch by leper, refs #2097

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@15726 3db68df2-c116-0410-a063-a993310a9797
fix heal_barracks tech

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@15727 3db68df2-c116-0410-a063-a993310a9797
Petra: some tunings in tech research following the merge of balance branch

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@15728 3db68df2-c116-0410-a063-a993310a9797
Merge 'remotes/trunk'