Add categories to gentoo requirements
Do not add a category to the git package
Merge pull request #1603 from xhochy/fix/gentoo-package-categories

Add categories to gentoo requirements
add support for downgrade, update #1527
Merge branch 'master' of github.com:wayneeseguin/rvm
add -d for rubygems installation for improved debugging, notify @memoht
add --autolibs for upgrade, update #1602
make upgrade run in context of current shell, fix #1527
search only existing paths for --all wrappers, use common find dialect, fix #1605
add a note for failed brew update, closes #1606
make sure sudo is not called when user does not ask for updates, closes #1594
require apple-gcc42 only bellow ruby-2.0.0, closes #1580
switch from curl-ca-bundle to OSX keychains, fix #1566
tyeset => typeset
Always use shell builtin grep.

Fix #1608
clean automated compiler selection for osx, update #1580
clean shared/static compilation switches, update #1580
Merge branch 'master' of github.com:wayneeseguin/rvm
fix rubygems head, fix #1609
fix codding error in build_config, claen ruby install