Higgs, bugs and nice plots

Added Higgs related items:
 - Higgs templates
 - Higgs to unfolding
 - electron + muon files for Higgs
 - signal histograms
 - scale factors for systematics and validation script
 - switch to just ignore the above

Updating recipe:
  - bug fixes from rootpy
  - Removed matplotlib from submodules
  - Removed rootpy from git tracking. This is an external package, should not be tracked (all in submodules).
  - added matplotlib to set up via pip install
  - Simplified gitignore
  - Moved unfold config dependency in tools/Unfold.py to constructor level
  - Added TopSVDUnfold

Unfolding, tests and formatting:
 - code formatting for Calculation, hist_utilities and plotting modules
 - added plot  function to compare measurements to theory
 - added tests for SVD unfolding
 - added plots for new physics
 - tau value unfolding updates
 - Added TopSVDUnfold

Updating tools:
 - setting default Hist creation to double precision
 - fixing off-by-one error for graph creation
 - Fixed decomposition of values and added unit tests for it
 - Added fix for overflow and unit tests for it
 - updated error calculation for fitting (yerravg instead of errors)

Other:
 - Added graph plotting example
 - fiddled around with examples (need to be simplified)