Ruby 2.1.
Fix horriable vim color in terminal.
Add vim-textobj-user to bundle.

Fix vim-textobj-rubyblock error:

Error detected while processing /Users/linjunpop/.vim/bundle/vim-textobj-rubyblock/plugin/textobj/rubyblock.vim:
line   16:
E117: Unknown function: textobj#user#plugin
Add chruby auto to powconfig.