rubinius 2.2.5
remove unused __rvm_current_gemcache_dir
improved linking of rubys gems default directory to rvm global gemset
remove ruby name from the search string for binary rubies, fix #2608
Revert removing ruby name from the search string for binary rubies, update #2608

This reverts commit 45ae5a2377c8f7146226ebbab52d618fdb74db1a.
fix fuzzy matching named rubies, fix #2608
call gem regenerate_binstubs for ruby wrappers when building rubinius, fix #2611
mruby 1.0.0 released, closes #2614