Merge branch 'hotfix/1.18.14' into stable
Add category to zlib as packagename is ambiguous

Fixes the following problem:

    [ Results for search key : zlib ]
    [ Applications found : 2 ]

    *  dev-haskell/zlib
          Latest version available: 0.5.3.3
          Latest version installed: 0.5.3.3
          Size of files: 122 kB
          Homepage:      http://hackage.haskell.org/package/zlib
          Description:   Compression and decompression in the gzip and zlib formats
          License:       BSD

    *  sys-libs/zlib
          Latest version available: 1.2.7
          Latest version installed: 1.2.7
          Size of files: 547 kB
          Homepage:      http://www.zlib.net/
          Description:   Standard (de)compression library
          License:       ZLIB

    !!! The short ebuild name "zlib" is ambiguous. Please specify
    !!! one of the above fully-qualified ebuild names instead.
Merge pull request #1599 from xhochy/fix/gentoo-ambiguous-zlib

Add category to zlib as packagename is ambiguous
remove double brew path in detection
Merge branch 'master' of github.com:wayneeseguin/rvm
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