Updated keymap for NERDTree
Added Android related file  path to /Applications/Android Studio.app/sdk/platform-tools:/Users/ryan/.rbenv/shims:/Users/ryan/.rbenv/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/Applications/Android Studio.app/sdk/platform-tools:/Users/ryan/.rbenv/shims:/Users/ryan/.rbenv/bin