Squashed '.vim/bundle/signify/' changes from 8893445..a2b0de3

a2b0de3 Fix :SyDebug for certain corner cases
b8184f2 Merge pull request 93 from @jamessan
5211c19 Move Sy's data from g:sy to b:sy
7320d73 Merge pull request 92 from @jamessan
4c18ddf Remove unmaps of non-existent maps.
1c762af Fix typo
2fbdc52 Fix handling of certain git implementations
6fab9cc Merge pull request 90 from @talmuth
f4b2350 Fix sign_overwrite for non-EN locales
5817de2 Merge pull request 86 from @thallett
ea5d13c Dynamically re-apply diff options on every diff
79cb027 Perforce: diff -du0 -> diff -dU0

git-subtree-dir: .vim/bundle/signify
git-subtree-split: a2b0de33596671886d34353e115279e815699060
Merge latest signify, '2265c599516bb5251716b7b41929bef4b7166066'