Merge pull request #128 from sethzenz/topic-prepare-production

Topic prepare production
avoid pujetid seg fault in extremeley rare case that a vtx has no dz-associated tracks
Merge pull request #130 from sethzenz/master

avoid pujetid seg fault in extremeley rare case
update for new tag
Merge pull request #131 from sethzenz/master

update for new tag
small fixes
Merge branch 'master' of https://github.com/cms-analysis/flashgg into test2
recoverd fwlite_vertex