MVA Photon ID

* Updated the mono-jet configuration [macros/runMonoJet.C](https://github.com/dimatteo/MitMonoJet/blob/master/macros/runMonoJet.C) to use the latest and graetest MVA photon ID developed by Mingming and the recommended photon energy regression.  Both of these are specific for the non-run-dependent 8 TeV MC. You need the HEAD of [cpausmit/MitPhysics](http://github.com/cpausmit/MitPhysics).  So please pull the recent update from this Monday and do `scram build`.
* Removed corrections and MC smearings derived on the Z->ee data as agreed with the Bacon guy(s) (Phil :-)).

**WARNING**: This will probably break the "new setup" where you can submit jobs to the Tier2! You may also need to copy additional weight files to `MitPhysics/data`. See cpausmit/MitPhysics#6 for details.

On the T3 MIT cluster, you should be able to pull these changes and test that it works like this (assuming CMSSW environment and Bash):

    ## Update MitPhysics
    cd $CMSSW_BASE/src/MitPhysics
    ## Assuming you are on the master branch and 
    ## and your origin points to git@github.com:cpausmit/MitPhysics.git
    git pull origin
    scram build -j4
    ## You may need to do `scram build clean' and repeat the above if the dictionaries misbehave

    ## Copy the weight files
    SOURCE=/home/veverka/cms/cmssw/032/CMSSW_5_3_14/src/MitPhysics/data/2013FinalPaper_PhotonID_Weight
    DESTINATION=$MIT_DATA/2013FinalPaper_PhotonID_Weight
    mkdir -p $DESTINATION/{7,8}TeV
    cp $SOURCE/7TeV/2013FinalPaper_PhotonID_{Barrel,Endcap}_BDT_TrainRangePT15_7TeV.weights.xml $DESTINATION/7TeV
    cp $SOURCE/8TeV/2013FinalPaper_PhotonID_{Barrel,Endcap}_BDT_TrainRangePT15_8TeV.weights.xml $DESTINATION/8TeV

    ## Update MitMonoJet
    cd $CMSSW_BASE/src/MitMonoJet
    ## Assuming your origin points to git@github.com:dimatteo/MitMonoJet.git
    git pull origin mva_photon_id
    ## No need to `scram build' here

    ## Run a test
    cd $CMSSW_BASE/src/MitMonoJet/macros
    ## Make sure you have a compatible .rootlogon.C macro
    cp /home/veverka/cms/cmssw/032/CMSSW_5_3_14/src/MitMonoJet/macros/.rootlogon.C .
    ## Run on 100 gamma + jet events to make a small tree
    ./run.py

The last step should give you output similar to this:

```Shell
[veverka@t3btch089 macros]$ ./run.py
 Make Shared Library option: cd $BuildDir ; g++ -DDLL_DECL= -c $Opt -pipe -m64 -Wshadow -Wall -W -Woverloaded-virtual -fPIC -DG__MAXSTRUCT=36000 -DG__MAXTYPEDEF=36000 -DG__LONGLINE=4096 -pthread $IncludePath $SourceFiles ; g++ -DDLL_DECL= $ObjectFiles -shared -Wl,-soname,$LibName.so -m64 -Wl,--hash-style=gnu -O2  $LinkedLibs -o $SharedLib
Info in <setRootEnv>: Welcome to Bambu! Loaded default libraries.

JV: Removing Plots for debugging
Info in <TUnixSystem::ACLiC>: creating shared library /home/veverka/cms/cmssw/032/CMSSW_5_3_14/src/MitMonoJet/macros/./runMonoJet_C.so
JSON /home/cmsprod/cms/json/-
*********** Is data?? **********1

 Initialization worked

 WARNING -- Looking at data without JSON file: always accept.


 Run lumi worked
 Catalog: /home/cmsprod/catalog/t2mit, Book: filefi/032, Dataset: s12-pj80_120-v7a, Fileset: 0000 --> 0000 root://xrootd.cmsaf.mit.edu//store/user/paus/filefi/032/s12-pj80_120-v7a 214110 214110 1 14 1 5687
 --> 0000 00376E3C-481A-E211-A37D-003048CF6334.root 11232 11232 1 14 1 3982
....
Info in <mithep::Selector::FindLoader>: branch 'StandaloneMuonTracksWVtxConstraint' use loader mithep::TreeBranchLoader
 HLTModP - Accepted events: 100 (/100)
selected events on MonoJetAnalysisMod: 100
Processed events on MonoJetTreeWriter: 100
selected events on MonoJetAnalysisMod: 0
Processed events on MonoJetTreeWriter: 0
selected events on MonoJetAnalysisMod: 2
Processed events on MonoJetTreeWriter: 2
```

Now you can list the transverse momenta of the first few photons and jets:

    ./test.py

The output should look similar to this
```Shell
photon-id_s12-pj80_120-v7a_noskim_0000.root:MonoJetTreeWriter/MJetTree
 Make Shared Library option: cd $BuildDir ; g++ -DDLL_DECL= -c $Opt -pipe -m64 -Wshadow -Wall -W -Woverloaded-virtual -fPIC -DG__MAXSTRUCT=36000 -DG__MAXTYPEDEF=36000 -DG__LONGLINE=4096 -pthread $IncludePath $SourceFiles ; g++ -DDLL_DECL= $ObjectFiles -shared -Wl,-soname,$LibName.so -m64 -Wl,--hash-style=gnu -O2  $LinkedLibs -o $SharedLib
Info in <setRootEnv>: Welcome to Bambu! Loaded default libraries.

JV: Removing Plots for debugging
************************************************************************
*    Row   *       run *      lumi *     event * pho1.Pt() * jet1.Pt() *
************************************************************************
*        1 *         1 *        14 *      4565 * 83.098789 * 82.433248 *
*        2 *         1 *        14 *      4566 * 103.69617 * 111.44007 *
*        4 *         1 *        14 *      4568 * 95.108363 * 73.665075 *
*        5 *         1 *        14 *      4569 * 95.084694 * 88.238609 *
*        8 *         1 *        14 *      4572 * 109.59074 * 69.405214 *
*       10 *         1 *        14 *      4574 * 82.944820 * 88.754576 *
*       14 *         1 *        14 *      4578 * 75.089855 * 152.77290 *
*       15 *         1 *        14 *      4579 * 142.44416 * 61.248359 *
*       18 *         1 *        14 *      4582 * 103.86326 * 120.68932 *
*       19 *         1 *        14 *      4583 * 71.382737 * 109.34078 *
************************************************************************
==> 10 selected entries
```