Submodules Externals/Git.hub, Externals/NBug, GitExtensionsDoc updated

Submodule Externals/Git.hub:
    > bc79290 - Add TreatWarningsAsErrors to all projects

Submodule Externals/NBug:
    > ce3f0bb - Update README.md
    > 8fa86bd - Fix link to nbug project.
    > c404b5a - extra security check for XML element names during serialization
    > 17602e2 - Add TreatWarningsAsErrors to all projects
    > 6148124 - Added spanish translation
    > 1cebd09 - Exception messages in English
    > fcdd7e2 - Layout of resizable dialogs corrected
    > f74a67f - Added Russian localization
    > 4069c5c - Revert "Doctor Dump integration"
    > e5a7eeb - Doctor Dump integration Russian translation
    > e7028cb - Added Finnish localization to the project file.
    > f66c094 - Added German localization.
    > c709cdb - Added Finnish localization
    > bda3f07 - Now incrementing file version for only major.minor versions and not for bugfixes
    > 5a382f6 - Update README.md
    > ade03b1 - Update CHANGELOG.md
    > 0a1793f - Decorated Logger with DebuggerStepThrough attribute
    > 7d24b13 - Another small improvement for issue #28
    > ad5501b - Fix for issue #28
    > 8991dee - Update CHANGELOG.md
    > 0187c69 - Update CHANGELOG.md
    > 704e2e9 - Changed MiniDump write for normal type
    > ec1c197 - Fix: Check if we can serialize ExtendedInformation
    > 657ec0d - Optimization: LINQ query was called multiple times
    > 77805b7 - Update README.md
    > bd8288c - Update README.md
    > 731dd50 - Delete ToDo.txt
    > b100af5 - Update CHANGELOG.md
    > 3a22a94 - Delete custominfo.patch
    > d554ec1 - v1.2.1 release
    > dedf21d - Create CHANGELOG.md
    > c4e54bc - Update README.md
    > 1aa4ef4 - Update README.md
    > c3176bb - Added nusoap.php.patch. Original file has bug when SoapFault is returned to .NET client as reported at http://sourceforge.net/p/nusoap/discussion/193579/thread/9a5aff36/
    > 8ac5da5 - Cleared SCC provider from project file
    > 3ecfded - Added support for Mantis Bug Tracker
    > d79eea4 - Updated about box with the MIT license info
    > 0ed6b3d - Improved support for custom submission
    > 3eeb0bf - Added Croatian localization
    > 4d19543 - [-] Corrigido erro ao gerar SerializableException.

Submodule GitExtensionsDoc:
    > d927f21 - a -> the
    > f5df8f8 - Update settings to 2.48
    > bb8b973 - Mono version changed to 3.8.0
    > f0e0646 - Tidy start of relocated settings chapter.
    > 9937c35 - Separate settings to its own chapter. Issue #61
    > 6941d3a - Fixes acording to @pmme review.
    > c90026d - Attempt to fix articles.
    > f1a0757 - Fix case. Add that committing is two steps. Issue #57
    > 3fa7839 - GitExt is not being used only by developers.
    > 79def89 - Staging selected lines. Issue #57
    > 013e902 - Reword branches chapter