Initial commit for opening angle
Import opening angle and time acceptance tools
Load libraries to read data & MC ntuples
Archive old tree readers (delete later)
Remove archived tree reader code
ROOT file browsing script
Command history for browse.py
browse.py: canvas name typo fix
browse.py: common value check and raises
browse.py: add selection and colours

FIXME: colours for 3D (probably also 2D) histograms do not work
browse.py: plotting scheme check bug fix
browse.py: add colours to histogram draw
browse.py: bug fix in ls
browse.py: add cd
tmva: notes
tmva: add to notes
browse.py: support browsing multiple files
tmva: list 3/fb DsK datasets
browse.py: bug fix typo
Merge branch 'gui'

* gui:
  classify.py: no event weights for now
  TMVAGui: from ROOT 6 source, with proper include path