Submodule GitExtensionsDoc updated

Submodule GitExtensionsDoc:
    > a120c4e - Fix incomplete sentence.
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' of git://github.com/gitextensions/gitextensions
Merge branch 'master' of git://github.com/gitextensions/gitextensions
Merge branch 'master' of git://github.com/gitextensions/gitextensions
Merge branch 'master' of git://github.com/gitextensions/gitextensions
Merge branch 'master' of https://github.com/gitextensions/gitextensions
Merge branch 'master' of git://github.com/vbjay/gitextensions
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Add submodule fetch option to BackgroundFetch plugin
Add Fetch All Submodules sample script
Update Korean translation (Settings)
fix SshAskPass.cpp c3861 error.

AtlLoadSystemLibraryUsingFullPath meet c3861 error an msvc2010 for x64.
As MSDN suggested change it to ::LoadLibrary.
#1247: Permanent CommandBar installation

Conflicts:
	GitPlugin/Connect.cs
	GitPlugin/Plugin.cs
Merge branch 'master' of https://github.com/gitextensions/gitextensions
Support VS2013 build
Merge branch 'master' of https://github.com/gitextensions/gitextensions
Update Korean translation (Settings)