move detecting tar options to the only place it matters, update #2918
speed up db read by removing extra grep, update #2918
improve db operations matching / in keys
fix instaslling older rubinius
terminate sed p in __rvm_db_get, fix #2924, fix #2921
rubinius 2.2.10
Merge branch 'master' of github.com:wayneeseguin/rvm
updated centos binary for 2.1.2, fix #2923
fix centos x86_64 epel repository