merge of fully hadronic from d-salerno/meanalysis 74x

[jpata]

solves conflicts of PR #38 (thanks Lea and Daniel)

• removed pos/neg counting in LeptonAnalyzer
• reverted hardcoded srm copy path in meanalysis-heppy.sh, we need a better solution if /shome does not work, e.g. set copy path & cmssw dir through .conf file
• uses newly-copied V12 samples, but QCD not added

@d-salerno @leaca:

• could you please make the MEAnalysis_cfg_heppy_data config import the main one and overwrite only the necessary parts (see cfg_withME.py for an example).
• we should find a solution concerning the .dat and .conf files for grid-control: we probably need two different sets of files for the two analysis paths (I don't plan to run FH channels or samples). could you work something out with includes, or maybe making sig-fh.dat/bkg-fh.dat?
• can you please check that this merge is good from your point of view? this would supersede #38.

[jpata]

As runtimes with 8 jets in btag-LR and FH selection enabled were somewhat disappointing (<10 ev/s), I made the FH path a separate config file. https://github.com/jpata/tthbb13/blob/d-salerno/meanalysis-74x/MEAnalysis/python/cfg_FH.py

@leaca @d-salerno I would merge this in the next days unless there are objections.