add __init__ files
remove sys.path.append; import modules/files properly
drop unused Integral function
utils.plot: cleanup

Details:
- avoid multiple imports of matplotlib
- clarify variable names
- warn, the labels should not be hardcoded
runPriors: cleanup

Details:
- remove obsolete 'usage' comment lines
- avoid Capitalized variable names
- define common variables once, then re-use it
- save output plots to priors directory
ignore plots
chmod +x
fix import
general cleanup, vertical compress
Integral -> count_outside_range
outfname as input par
outfname as input par
cleanup, save histos to subdir
Merge pull request #38 from gerbaudo/fix-module-path

Fix module path