added "have_framework" line for OSX.
Merge pull request #2 from oscdis/osxfix

added "have_framework" line for OSX.
Require rake-compiler dep to 0.9 for win32 build.
Merge branch 'master' of https://github.com/larskanis/glu
Bump VERSION to 8.2.1
Update History.rdoc for new release