Merge pull request #63 from slivingston/doc

Improve documentation
update synth tests to action constraint defined as TS attribute
replace pyparsing by ply in setup.py
style
replace pyparsing by ply in doc
simplify gr1c._create_machine_ports
set state variables loc, eloc of Mealy strategy
Instructions for installing on nessa
convert nessa readme to markdown
init nessa install script, lowercase filename
change extension to markdown
convert instructions from plain text to markdown
add sshfs and matplotlib backend info to server setup
link from doc to remote setup instructions
DOC: Fold user's uide source at 80 char width