Fixed setup_coolprop.py for py 3

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Removed fanno from PDSim.flow.__init__.py

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Updated git revision

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Small PEP8 compliance changes

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Only load files as potential plugins that have if __name__=='__main__': block

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Modified the packaging script for GUI in order to support more flexible structure, calling from other routines, etc.

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>