orderings classes
fix sorted key
avoid_repeats parameter of Shuffled ordering
change find_section method to just section
change config parsing to support new ordering API
add experimentator.orderings module to setup.py
update README
typo fix
implement calling first_pass of each level's ordering
implement new ordering syntax handling
add TODO item
better handling of default settings
call first_pass on top level's ordering
defaults are already handles
update existing tests