remove gtest, add igloo
add test to xcode
integrate with stepmania's code base

now able to test some basic stuff like "IntToString".
rename directory "Tests" to "test" (to match with most projects)
Port tests…even though some fail.

Maybe it just has problems on Mac?
Well, this works in windows.

Now for why Mac OS X is stubborn...
May as well clean up while here.
Right. Add to targets.
That's enough tests for now.
Merge branch 'igloo' into sm6
Remove Google Test for now.