Fixes to layout BhallaLab/moose#204.

Changes Function symbol to summation symbol, objectedit.py function e…

…xpr is not editable as this summation of pools, some cleanup with colors selection,Function which is now just summation object, set's up setN for output as input is nout

removal of whitespace in target Name

notes are written back to genesis and filename is cleaned up

Tagging for moose 3.0.2