Fixed a couple of regexp syntax issues.
Also changed flowchart appearance:
Instruction block text is justified.
Block entry label moved to top of block to avoid indent issues.
Flow lines now go from the bottom of a block box to the top of the next block box.
Changed default flow file handling so that .flow.gv is created in the wd from which the command runs.
Fixed a couple of regexp syntax issues. Also changed flowchart appearance: