Anddddd revamp of rbenv! Hello again~
Update ruby-build, delete a couple of rbenv plugins

Also, now install Table-Mode vim plugin. With that, remove the Tabular
insert-mode mapping for |.
Delete various comments

It's git. Need what was in comments? Go back in history.
Include ack bundle
Show commit's author, not the committer in the log
hard code path relative to ~ for zsh history
Update gemrc file to be binstub/rbenv friendlier
Don't include ~/.gem/*/bin in $PATH any more
Update various submodules to latest master