This is more reliable and fixes an issue where the syntastic location
list of the original file would be focused after `:Gdiff`.
Ref: c99f0ff06b (commitcomment-9434351)
* Provide :Gpush, :Gfetch, :Gmerge, and Gpull.
* Use -L to handle :Glog range.
* :Gcommit -v opens message in new tab.
* API for custom :Gbrowse handlers.
* Invoke :Browse if available to open URL.
* Colorize hashes in :Gblame buffer.
* Set cursorbind and nobuflisted in :Gblame buffers.
* :Gblame in blame buffer toggles buffer.
This implements the changes suggested in tpope/fugitive#415.
s:repo_configured_tree is now a global, s:configured_tree() that caches
the bidirectional relation between the worktree and the git_dir.
extract_git_dir() now uses that relation to check whether the
directories it scans are valid worktrees known by the repo at $GIT_DIR.
Taking experimental out of the name, but small tweaks may occur before
then next release.
For future compatibility, any third party handlers should bail and
return an empty string if any of the following are true:
* More than 2 arguments are given.
* The second argument isn't a dictionary.
* The dictionary doesn't contain a "remote" key.
Closes#445.
* <C-R><C-G> in :Gstatus recalls cursor line filename.
* Map dp to show diff in :Gstatus.
* Add ca and cA commit maps to :Gstatus.
* Add cc alias for C in :Gstatus.
* Disable swapfile in :Gstatus.
* Replace :Gstatus cv with cva and cvc.
* Add an `S` mapping for vertical splits from :Gstatus.
* Close diffs when navigating from :Gstatus.
* Enable folding in :Gstatus.
* Accept a count with :Gstatus <C-N>/<C-P>.
* Allow <C-p> pass through to ctrlp.vim in :Gstatus.
* Add . in :Gstatus to prepopulate command line with revision.
* Fix :Gstatus dp with external diff enabled.
* Force displayCommentPrefix to fix :Gstatus on 1.8.5+.
* Support localized `git status`.
* Map g? and <F1> to show help in :Gstatus and :Gblame.
* Kill relativenumber in blame buffer.
* Fix jump to line on reblame.
* Return to blamed buffer on q in blame.
* Restore blamed window on gq in blame.
* Fix :Gblame scrollbind with folds.
* Jump from blame to commit focuses relevant diff.
* :Gblame: Retain original alternate buffer.
* Use - not <CR> for reblame.
* Switch :Gblame <CR> to open commit.
* Open fold when jumping to commit from blame.
* Add maps for resizing blame window.
* Conceal file names and line numbers in :Gblame.
* Set winfixwidth in :Gblame buffers.
* Press <CR> in :Gblame to open commit (reblame is now -).
* Better csh support.
* Work around "always" color option.
* Fix trailing blank line when editing index files.
* Use HTTPS for GitHub URLs in README.
* :Gdiff split direction based on 'diffopt' and window size.
* Focus diff window on :Gdiff.
* Restore options when turning off diff mode.
* Set bufhidden=delete in historical buffers.
* Fix modeline errors in historical buffers.
* Change cp to cP.
* Add :Git! et al. for loading output into a buffer.
* Tab complete Git aliases.
* Enter on a +/- diff line jumps to that line.
* Better Windows support.
* Support core.autocrlf=false on Windows.
* Work around slow \\ Windows network path.
* Work around .git in 'wildignore'.
* Fix garbage during :Gcommit with alternate screen.
* Fix garbling on :Gcommit when nothing is staged.
* Hack around broken :Gcommit with symlinked .git.
* Use y<C-G> to yank the current object's path.
* Preserve alternate file in :Gmove.
* Support bare repositories that don't end in .git.
* Support .git-file repositories (including submodules).
* Support symlinked .git if core.worktree is set.
* Fix redraw issue after :Gbrowse.
* Support GitHub FI in :Gbrowse.
* Support implicit GitHub username in remote for :Gbrowse.
* Make fugitive commands available in nerdtree buffers.
* Make fugitive commands available in command line window.
* :Glgrep and :Gllog.
* :.Glog jumps to same line in each file.
* Map - to go up a directory.
* Provide custom 'foldtext'.
* Respect $GIT_CEILING_DIRECTORIES.
* Look for $GIT_DIR and $GIT_WORK_TREE.
* Improve Windows support.
* Assorted bug fixes.
