Use add-in attributes to define dependencies in C and C# addins
Bump mono-addins
Remove hardcoded add-in versions
Merge branch 'master' into deps-in-attributes

Conflicts:
	main/external/mono-addins
	main/src/addins/CBinding/CBinding.addin.xml
	main/src/addins/CSharpBinding/CSharpBinding.addin.xml
	main/src/addins/Deployment/MonoDevelop.Deployment.Linux/MonoDevelop.Deployment.Linux.addin.xml
	main/src/addins/Deployment/MonoDevelop.Deployment/MonoDevelop.Deployment.addin.xml
	main/src/addins/Deployment/MonoDevelop.Deployment/MonoDevelop.Deployment.csproj
	main/src/addins/MonoDevelop.Debugger.Soft/MonoDevelop.Debugger.Soft.AspNet/Manifest.addin.xml
	main/src/addins/MonoDevelop.Debugger.Soft/MonoDevelop.Debugger.Soft/Manifest.addin.xml
	main/src/addins/MonoDevelop.Debugger.Win32/MonoDevelop.Debugger.Win32/MonoDevelop.Debugger.Win32.addin.xml
	main/src/addins/MonoDevelop.Debugger/MonoDevelop.Debugger.addin.xml
	main/src/addins/MonoDevelop.GtkCore/MonoDevelop.GtkCore.addin.xml
	main/src/addins/MonoDevelop.XmlEditor/MonoDevelop.XmlEditor.addin.xml
	main/src/addins/MonoDeveloperExtensions/MonoDeveloperExtensions.addin.xml
	main/src/addins/NUnit/MonoDevelopNUnit.addin.xml
More hardcoded add-in version removal
Bug #755 - Updated the AssemblyBrowserWidget to have a nullable boolean for selecting projects/references to it so the default selection behavior can be changed by a user preference.
Bug #755 - Implemented the ability to have a user preference for automatically selecting a reference in the Assembly Browser.
Merge remote-tracking branch 'upstream/master'
Bug #755 - Altered the default behavior to always select the chosen project/reference instead of being a user preference.
Merge remote-tracking branch 'origin/master' into deps-in-attributes
Fix broken add-in manifests
Read the configuration version from a file
Use correct configuration file
Get the package version number from MD's version.txt file
Bump mono-addins
Move version.txt to the root dir
Add missing mono.addins reference
version.txt has been moved to the root dir
Merge branch 'master' into deps-in-attributes
[Core] Generate the BuildVariables.cs files in the msbuild project