Update README.md
A change in pyPEPA procedure, faster iterator
Better logging with singleton, new file utils.py

- logging is now a singleton
- utils.py for pretty print procuedures and formatters for pyPEPA
Added utils.py
Formatter for csv
Output file
Readme updated for output and format
Formats and outputs for steady, transient and throughput
Merge branch 'dev'

Conflicts:
	README.md