support host-specific scripts in bashrc
put git branch in PS1
grep: use PCRE by default
add git aliases
save python interpreter history
tmux.conf improvements

- vim bindings for paste mode
- emacs bindings when typing tmux commands
- coarser pane resizing
- <prefix>-o to go to the last pane
vim: display tabs and trailing whitespace using listchars
vim: Copy command should copy to clipboard, not primary
vim: Chars function to test character display
vim: jedi config
vim: make syntax errors less painful on the eyes
vim: Find In Files Matching

Kind of a second-order search function. Grep files that also match
another pattern.
vim: pass args through for Pep and RBCheck