Print mean lifetime at end of XtoFFfilter
Merge pull request #5134 from tomalin/XtoFFfilterV2

GeneratorInterface/GenFilters -- Print mean lifetime at end of XtoFFfilter
.gitignore: ignore VIM temporary files
.gitignore: ignore EMACS temporary files and autosaves
Merge pull request #5153 from fwyzard/gitignore_temporary_files

.gitignore: ignore some common temporary files
Merge remote branch 'origin/CMSSW_7_2_X' into CMSSW_7_0_X