osx: Now the OSX-10.7 project only builds for x86_64, since all Macs with that OS support are 64-bit.

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2533 86ba831e-150c-0410-ab35-e06eaae15ed9
Added installation-friendly user/base path searching.

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2535 86ba831e-150c-0410-ab35-e06eaae15ed9