add RailsSearch functions for ag
change ctrlp rails back to j
set binary and noeol
change back rails keycaps
clean up tmux.conf. Remove color settings (colors are set in powerline)
Revert "set autowrite"

This reverts commit 2576a0c5d76c10a4e2b7d4cafa12e5c55d8c586e.
change rails keymaps: (j)ump - rails.vim, (f)ind - ctrlp, and s(earch) - ag/grep