F# syntax highlighting had duplicate 'sig' keyword

Removed the duplicate! This is an OCaml reserved word, see:
http://msdn.microsoft.com/en-us/library/dd233249.aspx
Fixed 'Bug 20546 - Typing "///" on nested class does not create
Summary block'.
add MonoDevelop.Debugger.Gdb so that it becomes part of the tarball
Merge pull request #586 from tpokorra/fixTarBallDebuggerGdbMissing

add MonoDevelop.Debugger.Gdb so that it becomes part of the tarball
Updated references to xwt, md-addins
Updated references to xwt, md-addins
[configure.cs] Try `/usr/bin/git` before falling back to `git`.
Merge pull request #579 from rneatherway/duplicate-sig-keyword

F# syntax highlighting had duplicate 'sig' keyword
Merge pull request #588 from alexrp/master

[configure.cs] Try `/usr/bin/git` before falling back to `git`.
[main] Don't silence the invocation of configure.exe to generate buildinfo.
Merge pull request #589 from alexrp/master

[main] Don't silence the invocation of configure.exe to generate buildinfo.
[configure.cs] Trim leading `^` if present in `git blame` output.
Merge pull request #590 from alexrp/master

[configure.cs] Trim leading `^` if present in `git blame` output.
[Ide] Fix for ResxGenerator parent directory issue

There was a mistake in my last bug fix causing it to look in the parent directory of the intended directory for its files.
Merge pull request #591 from MatthewDiamond/patch-1

[Ide] Fix for ResxGenerator parent directory issue
Fixed Bug 6618 - Find in Files don't work with whole solution option

Included solution items in search.
Merge pull request #592 from vitorelli/master

Fixed Bug 6618 - Find in Files don't work with whole solution option
[po] Fix bad tag casing in nl.po

BXC6676 - HTML characters visible with Dutch language
[T4] Added nuspec
[NuGet] Fixed Bug 18951 - Incorrect path separator used for Import.

https://bugzilla.xamarin.com/show_bug.cgi?id=18951

Incorrect path separator used when adding MSBuild .targets/.props
file to a project when installing a NuGet package. On the Mac the
forward slash character was being used for the path to the .targets
file. All paths in MSBuild project files should use backslash on
all platforms. If forward clashes are used then updating a NuGet
package on Windows will fail to remove the old import from the
project. It will also cause the build to fail since the path is
resolved to a directory inside Program Files.