NF: Added a ParallelOut component to the Builder for sending sync pulses

needs testing!
ENH: added unifed parallel.ParallelPort for all backends

also added a status attribute to aid in use from Builder
BF: fixes to parallel port setting of port address
FF: changes to parallel ports to work with Builder (converting args from strings etc)
ENH: Correct comments in builder component source

Three source files had comments incorrectly copied from related files.
I fixed this by reproducing the available tool tips or changing words.
Merge pull request #404 from philippwiesemann/master

ENH: Correct comments in builder component source
BF: polygon with a variable fill/line color wasn't working
BF: set fill color from variable in _base.py

- avoids error no attribute polygon.setFillcolor (should be setFillColor)
BF: Builder edit conditions file