Fallback to $1:all in DPKG if Arch fails.

Please file tickets.
CC: @theschoolmaster
preserve PROMPT in ZSH when __rvm_unload, update #1830
Merge branch 'master' of github.com:wayneeseguin/rvm
change rubinius flag to select default version
whitespace formatting
switch the default autolibs to 4 and add a upgrade note, closes #1831