Add datacard class w/ tests
Move to a test directory
Use dir structure to use nosetests
Import libs in a smarter way
First version of limit class: based on plotter
Add script to run limits
A few bug-fixes
Fix float formatting
PEP8
Run multiple mass points
Add remaining Hpp4L xsec
Add mass/sT cuts
Fix systematics
Add ability to make limit plots
Merge branch 'limits_dev'

* limits_dev:
  Add ability to make limit plots
  Fix systematics
  Add mass/sT cuts
  Add remaining Hpp4L xsec
  Run multiple mass points
  PEP8
  Fix float formatting
  A few bug-fixes
  Add script to run limits
  First version of limit class: based on plotter
  Import libs in a smarter way
  Use dir structure to use nosetests
  Move to a test directory
  Add datacard class w/ tests