Cleanup SelfUpdate::Base::devtools_check
Selfupdate: clarify some POD comments
Selfupdate: simplify code
Remove last traces of the long-obsolete SelfUpdateCVSTrees
Correct indention, removing trailing spaces
Move a call to chomp() to the right place
Extrapolate future kernel version to OS version mappings
Simplify get_darwin_equiv
Make sure gcc_selected() returns something useful on Xcode 5.

On Xcode 5, /usr/bin/gcc is no longer a symlink but actually clang.
This causes Fink::Services::gcc_selected() to return "0" which prevents
fink from installing. It would also break installing packages with a
GCC field. This patch always returns "4.2" when gcc is clang.
Merge safe part of Futureproof2
Extrapolate Xcode versions for future releases
Updated supported Xcode versions.
Merge pull request #87 from akhansen/fix-xcode5-bootstrap

Fix supported Xcode versions for bootstrap using Xcode 5 on 10.8
Merge pull request #85 from danielj7/xcode-5-fix

Make sure gcc_selected() returns something useful on Xcode 5.
Comment that hardcoded "4.2" return value in gcc_selected() is for compatibility with enforce_gcc().
Merge parts of selfupdate-git2 branch
Update bundled docs for 0.35.2 release.
Update with 0.35.2 features and 0.36.x plan.
Forbid PYTHONPATH in RuntimeVars (https://github.com/fink/fink/issues/88)