Refactoring inline msbuild tasks.
Fix Nitra.Core project.
IDE support for bootstrapping.
Create registry key if one not exists.
Remove IDE extension from bootstrapping.
Fix extension version in VSIX.
Merge remote-tracking branch 'origin/master' into hardcase_work

Conflicts:
	VisualStudioExtensions/Nitra.VisualStudio/Nitra.VisualStudio.nproj
Simplify bootstrapping.