Merge pull request #13 from smuzaffar/master

releases.map added which contains the list of all releases
Add updateVOTags to cms-bot.

- Import from ib-scheduler.
- Make it use the new releases.map file.
Add new milestone.
Add CMSSW_7_1_0_pre1 for slc5_amd64_gcc481 as .
Change Mark's account...
Add CMSSW_7_1_0_pre2.
Add CMSSW_7_1_0_pre1 for slc6_amd64_gcc481 as .
Add CMSSW_6_2_6 for slc6_amd64_gcc472 as .
Add CMSSW_4_1_9 for slc5_amd64_gcc434 as .
deprecated CMSSW_5_3_13_cand1 and CMSSW_5_3_4_cand2