rvmrc can be overridden by .rvm.local as well as .rvm_custom [ci skip]

.gitignore

@@ -19,6 +19,7 @@ vendor/bundle/*
 vendor/cache/*
 config/database.yml
 .rvmrc_custom
+.rvmrc.local
 
 #Mailing list stuff
 config/email_offset

.rvmrc

 #!/bin/bash
-if [ -e '.rvmrc_custom' ]; then
+if [ -e '.rvmrc.local' ]; then
+  source .rvmrc.local;
+elif [ -e '.rvmrc_custom' ] ; then
   source .rvmrc_custom;
 else
   rvm --create use ruby-1.9.2-p290@diaspora