Enabled keyword autocompletion again/Prep'd for ag plugin/Added highlight option to ack/Re-arranged some settings in vimrc
Fixed entry for ag plugin in manage_subtrees
Squashed 'bundle/ag/' content from commit d3a00f8

git-subtree-dir: bundle/ag
git-subtree-split: d3a00f8affb091e7a14eb34f1beb9db9bb57a4bf
Merge commit 'db281c4ca9522d8ba735343ea30da754f2828b1f' as 'bundle/ag'