Have content generators add their dependencies to the graph.

[carbontwelve]

Content Generators should be added as dependants of the template that required them. The complexity here is that the generator needs to be added as a dependant of the files that it uses for input while also being the parent to the files it generates.

Should we care about the files it generates? They pose no real purpose other than taking up RAM.

This is a much larger task than expected:

• Mark @deprecated generators found in Entities folder
• Write GeneratorInterface
• Write AbstractFileGenerator class
• Stub out skeletons foreach: CollectionItemGenerator, PaginationGenerator, TaxonomyArchiveGenerator and TaxonomyIndexGenerator.
• Write CollectionItemGenerator
• Write Unit Test for CollectionItemGenerator
• Write PaginationGenerator
• Write Unit Test for PaginationGenerator
• Write TaxonomyArchiveGenerator
• Write Unit Test for TaxonomyArchiveGenerator
• Write TaxonomyIndexGenerator
• Write Unit Test for TaxonomyIndexGenerator
• Delete Entities/Generators

This is a sub task of #311