vim: move everything to pathogen.

* also remove snipmate.
repo: clear out a .DS_Store file.
repo: ignore a bunch of sbt caches.
vim: fix gvim font setting.
vim: a bunch of new mappings; kill cmd+* mappings.
vim: enable relative numbering if vim is new enough.
vim: new config for new plugin versions.
ash: kill oh-my-zsh's default git aliases.
xmonad: add new layout options; bind change layout keys.
zshrc: new paths; tweak aliases; new opscode name.
ack: initial ackrc.
sbt: add sbt-idea plugin.
tm2: initial tm_properties.