Cleanup examples

[chick]

Cleanup-examples

• Put the add css stuff in the right place
• Put the open file stuff int the right place
• use getTargetDir where-ever possible
• Make ModuleLevelDiagrammer respect start module
• Get rid of all the old annotation stuff, too clunky
• Add run method for ease of example implementations
• Add firrtlSource to Config to make run more flexible
• Simplify all the examples
  • remove annotations, where used
  • simplify firrtl generation
  • get rid of unnecessary UnitTesters
  • move them all into the same package