Add two plugins (#638)
Add two plugins (#638)

Adds two plugins to the list:
- Internal/External Module
- Single Line Tags
TypeStrong/typedoc,sebastian-lenz/typedoc,PolymerLabs/typedoc,TypeStrong/typedoc,TypeStrong/typedoc,PolymerLabs/typedoc,sebastian-lenz/typedoc,PolymerLabs/typedoc,sebastian-lenz/typedoc