Add Vundle submodule, Dash.vim

- Add Dash.vim
- Only track Vundle as a submodule
- Ignore bundles directory contents
Open tmux windows and panes with current PWD.

- Also fix the new pane shortcuts:
    * prefix + p for a new vertical split
    * prefix + c for a new horizontal split
Fixups

- Update psqlrc
- Restore rspec TDD mappings
Tweak vim-opener, add debug printing
Add history-beginning-search to zsh prompt
Add root markers to Ctrl+P
Add Ultisnips snippets for cucumber
Have Ag ignore select .vim subdirectories
Add vim-cucumber and Dash, drop multi-cursors
Minor fixes
Add mappings for cucumber
Remove multiple cursors
Move todo.cfg to home directory
Remove vim-livedown from bundles, add local zshrc/bash_profile
Set initial fold level to 1
Change rspec format to progress
Change history control to up-line-or-beginning-search
Add CoffeeScript folding
Add empty vim subdirectories
Make tmux resizing keybindings repeatable