NF: rep measures confidence

BF: subplots, yerr and values agg should be lists
BF: small fixes to reordering
multiple changes

RF: made wx optional -- unless you run an app
BF: remove "" from string inputs
NF: Arg and Params classes (non-functional at the moment)
BF: can pass many parameters to plot now

BF: unstacking levels fixed
RF: exit keys checking moved to a new def

RF: Info parameter now has 'repository' parameter instead of 'register'
and 'push', and can thus be initiated via repo_action()
NF: Analyzer!

Initial prototype