1.2dev: Refactored `PygmentsRenderer` class. Refs #5654.
1.2dev: Refactored `PygmentsRenderer` class. Refs #5654.

Break _init_types function into 3 lazily-evaluated properties.


git-svn-id: 0d96b0c1a6983ccc08b3732614f4d6bfcf9cbb42@14208 af82e41b-90c4-0310-8c96-b1721e28e2e2

rbaumg/trac,rbaumg/trac,rbaumg/trac,rbaumg/trac