updated scram version to V2_2_5_pre8 which now prints only warning for scram_arch/os mismatch
Merge pull request #652 from smuzaffar/IB/CMSSW_7_0_X/stable

updated scram version to V2_2_5_pre8 which now prints only warning for s...
Merge remote branch 'origin/IB/CMSSW_7_0_X/stable' into IB/CMSSW_7_0_X/stable
Merge remote branch 'origin/IB/CMSSW_7_1_X/stable' into IB/CMSSW_7_0_X/stable