Merge pull request #135 from ajgilbert/tail-fitting-update

Tail fitting update
reviving the H125 constraint in mA-tanb
allow log x and log y plotting, slight rearrangement of label and legend positions
reviving H125 constraint in mA-tanb
Merge pull request #136 from roger-wolf/master

Work on mA-tanb layout
add W+jets shape systematic for et,mt and ttbar shape systematic for em