Squashed '.vim/bundle/signify/' changes from 5dd80d4..2c192d6

2c192d6 Merge accurev support
381f003 README: add accurev
e9747e7 Add support for accurev
be2d729 Gitignore: update
d6086e7 Docs: minor corrections
3c5d450 Docs: use full sentences
d5f7bd5 Docs: "amount" -> "number"
d6c1fd7 Doc: update 'local additions' header
b720a97 README: remove sign_change_delete var
1ee010e README: remove 2.0 note
60105c6 Docs: simplify sign explanation
673d17a Indicate deleted lines for ChangeDelete signs
4c8fa59 Setup hl groups on VimEnter
16359f4 Put hl group linking into a function
abdd630 Fix wipeout error

git-subtree-dir: .vim/bundle/signify
git-subtree-split: 2c192d6ada97be04ad0a253a44192f33813f266e
Merge latest signify, '2432573685106c4ecc9bf805de29627af553795e'