Merge branch 'dev/limits'

* dev/limits:
  Add 100% BPs
Start Yields class
Setup code for sideband method
Include sideband bounds
Create MC/datadriven yield comparison table
Add init to base package and update ignore
Get rid of plot_junk file
Add ability to specify channel
Add low-stat conditions
Change reporting of bkg errors
Add CMS Preliminary and polish plots
Don't use PGF
Merge branch 'dev/limits'

* dev/limits:
  Don't use PGF
Merge branch 'dev/yields'

* dev/yields:
  Change reporting of bkg errors
  Add low-stat conditions
  Add ability to specify channel
Merge branch 'dev/plots'

* dev/plots:
  Don't use PGF
  Add CMS Preliminary and polish plots
Extend 4l st range
Fix bkg error calculation
Merge branch 'dev/yields'

* dev/yields:
  Fix bkg error calculation
Add bkg yield directly to datacard
Use sideband method for bkg in datacards