Revert "Merge pull request #1046 from cms-sw/revert-1028-topythia8200pre1"
This is the revert of the revert of the pythia8 changes.

This reverts commit 086db1c9787641dc16c81e38efc7d15cca2e6fec, reversing
changes made to d04e9c853ede3f887552e9ee87925d2d3b5716e2.
update to pythia 8.200pre2 (still from tarball in generator afs area)
prevent evtgen from trying to link to obsolete pythia8 library
Merge pull request #1054 from bendavid/pythia8200pre2

Pythia8.200pre2
Merge remote branch 'origin/IB/CMSSW_7_3_X/stable' into IB/CMSSW_7_0_X/stable