Merge pull request #18 from nikberry/backup

Backup
Merge pull request #19 from nikberry/backup

flat SF's for electron
Merge pull request #20 from nikberry/backup

Iso SF's and flat electron SF's
Merge pull request #21 from nikberry/backup

all SF's and top PT reweighting
Merge pull request #22 from nikberry/backup

changed top pt to just TTJets and TTGamma and wrote Dilepton Trigger fun...
Merge pull request #24 from nikberry/backup

SF's and top pt reweighting on form
add n-1 for photon analyser and make so that folder is DiLepton so easier to read in plotting tools
fix a few conflicts
Merge pull request #23 from phy6phs/test

changes to TTbarPhotonAnalyser
added photon sans cuts into selection to calculate purity