osx: Finished all the process for OSX 10.6 building, which results in an universal binary with standard C++11 library from Clang included. Tested to work.

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2543 86ba831e-150c-0410-ab35-e06eaae15ed9
osx: Fixed a typo in the plist changer

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2544 86ba831e-150c-0410-ab35-e06eaae15ed9
osx: Now the front-end recognizes command-line arguments and starts Eternity with them. Do not use C strings for it.

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2545 86ba831e-150c-0410-ab35-e06eaae15ed9
osx: make sure that Doom-relevant environment variables are passed.

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2546 86ba831e-150c-0410-ab35-e06eaae15ed9
Update to AUTHORS file for LLVM libc++ which may be included with MacOS X builds.

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2547 86ba831e-150c-0410-ab35-e06eaae15ed9