Override the library variable by specifying the git/svn module as a tuple (url, library) instead of just the url string.
The module path (checkout directory) is modified by appending the repository basename with the library. 
Backwards compatibility with plain url is maintained.
This allows multiple versions of the same repository to be imported into the project, with them separated into different library namespaces.

Fix VHDL parser to correctly handle instances of components. Assumes component declaration is either in the same file, or is in an included package.

Move relation from architecture-uses-entity to entity-uses-arch for the case where the entity declaration is in a different file to the architecture.

VHDL_parser.py extracts the library from instantiations.
new_dep_solver.py does not assume the work library.
core.py inherits the library from the parent Manifest.

Gobble entire VHDL function to avoid input parameters being recognised as instances.
Entity instanciations recognised as instances as well - borrowed from rjen's commit d0ba0268 on feat_svn_ise branch.