Merge branch 'hotfix/1.20.12' into stable
implements Arch Linux specific package checking functions
remove debian/ubuntu specific lib_available check out of generalized code
Merge pull request #1933 from ryenus/master

fix jruby installation issue on Arch Linux
escape all tr's, fix #1932
Merge branch 'master' of github.com:wayneeseguin/rvm
sync autolibs documentation from the site
fix return status for alias show, fix #1934
1.20.13
Merge branch 'master' into hotfix/1.20.13
Merge branch 'hotfix/1.20.13'
remove unecesary parameters from checking functions