Directory bin/ removed

The directory used to contain code to create auxiliary files with event weights. The most of this code has been moved to PECLocalFwk
framework. The only remaining portion is PDF reweighting, which is not used in the analysis at the moment. When the analysis is ready
to incorporate it, the directory will probably be recovered from "initial" tag, and the code will be updated.
CMSSW tags have been updated to PAT recommendations

The tags have been updated according to [1]. Also LumiDB tag is updated to the latest one. Other tags (for b-tagging, MET corrections, etc.) have not been checked and and might also require an update w.r.t. to release versions. The code is compiled without errors, but it have not been run.
[1] https://twiki.cern.ch/twiki/bin/view/CMSPublic/SWGuidePATReleaseNotes52X#V08_09_62
Tags for electron MVA ID have been updated

The tags are set as recommended in [1]. The code compiles successfully, python fails when processing the configuration.
[1] https://twiki.cern.ch/twiki/bin/view/CMS/MultivariateElectronIdentification#Recipe_for_53X
Setup for electron isolation has been updated

Code has been updated to account for electron rho-corrected isolation. Comparing to the previous version, a required plugin has been dropped from the official subpackage, and I had to fork it into SingleTop subpackage.
Setup updated to include electron MVA ID correctly
Documentation for electrons has been checked and improved a bit
Documentation for muon definition has been improved
MET optional filters have been reviewed and updated
MET corrections for real data have been reviewed and updated

As before, type-I, type-0 and phi-modulation corrections are applied. The latter have been updated to cover the whole 2012 data-taking range (instead of ABC in previous iteration).
MET corrections for simulation have been updated. Correct collections are used now

Application of MET corrections in simulated events has been reviewed and updated. Bug affecting 2012Alpha_v2 campaign when a wrong MET collection was used instead of corrected MET is fixed. A mismatch between python configuration and CMSSW plugins in case of real data has been fixed (just ported from the grand previous commit, where it has been dropped mistakenly)