BF+NF: multiple small fixes and some new stuff

NF: report option added
ENH: existing window detected automatically
BF: window size set in create_win
NF: show_intro, go (works with nReps>1)
RF: loop_trials -> _loop_trials
BF: display added
RF: get_behav_df is now outside Experiment class
BF: multiple small fixes and one big (mask flipping)

ENH: condlabel and durlabel variables added
ENH: when loading saved, saving time printed
NF: get_behav_df from exp
RF: get_data -> get_agg
ENH: subjID and ROI are now the first, not last, columns in the output
BF (temp): mask is manually flipped because pymvpa2 doesn't to use
affine
BF: Preproc has extraInfo and runParams
ENH: oneval parameter to return only one output
ENH: multiple small enhancements

ENH: aggregate add_names option added
NF: get_star for printing sig. stars
ENH: mds split into mds and classical_mds
ENH: labeling of shared axes, new plots and more!

BF: shared axes labeling resolved to some extent
NF: draW_sig for drawing significance star
RF: xxxplot -> xxx_plot
NF: scatter_plot, histogram, matrix_plot, mds_plot