deleted depreciated modules and move other modules or files
re-written utils modules
iris-related functions available in tools
re-written io modules (writing from built-in python data structures)
added a new version of CTM diagnostic API
changes on the iris backend (not yet operational)
removed compiled pyc files from git
fixed issue with setup.py develop
moved files in examples and added notebooks (temp)
new empty tests folder
choose whether to show warnings in stdout or not
temp change