Switch to setup.cfg and use pyHDLParser fork as dependency

[kammoh]

Hi,
As far as I could see, your pyHDLParser has not yet been published on PyPi.
This PR:

• Switches to using the modern setup.cfg (setup.py is set to be eventually deprecated)
• VHDL: there's no reason a 'component' definition should exist, especially in the file containing the actual implementation (entity/architecture). Suggested Fix: use both components (increase backwards compatibility) and entities.
• Use https://github.com/hdl/pyHDLParser.git for the pyhdl dependency
• Bump version to 1.1.0 to avoid version collisions
• cleanup and format symbolator.py (as a first step)

Hope it's going to be useful. Please let me know if you'd like any changes.