from __future__ import absolute_import
mv root_collections to collection
mv math.physics.vector to vector
mv math.physics.measure to measure
rm math.physics
mv math.linalg.matrix to matrix
mv fit to stats
mv correlation.py and qqplot.py to stats/utils
new plot_quantiles example
fix tests
matrix improvements
rename convert in root2hdf5.py to root2hdf5
fit.txt -> stats.txt