Fix LDC stdlib source folder structure.
Added detection of likely Arch Linux compiler installs.
Fix bug in MathcLocator for searches.
Added D Standard Library element to Project Explorer.
moves and renames
projectmodel moves and renames
Refactoring of WorkspaceModel singletons.
Renamed the shared launches.
Fixed minor thread leak in tests.
fixed some IProject manipulation concurrency bugs. (more to come)