binned_data - added more shape checking in __init__, shape properties,
    and ignore_prev and rename_units to make_bnd_with_count_from_rate
postfactors - made mlab import optional, added kwargs to
    plot_tuning_trajectory and ..._gs, subplot_spec to plot_scores
azel_plots  - added subplot_spec to plot_many_azel and plot_array_azel,
    frame_width to plot_azel
fit_gam.R - added const & changing B_d model
kinematics  - added option to use faster unitvec_f2d
binned_data - make_bnd_with_count_from_rate now resets lags when rename_units is True
fit         - added support for 'kqX' model in prepare_regressors
gam_new     - deprecated gam_new -> gam_old, added gam_plus which creates dictionary key,values for eacah model
fit_gam_plus.R - complements gam_plus by adding 'kqX' model support