CAP-1648 Normalize data sets, thread usage of data sets etc.
Merge branch 'master' of github.com:mongodb/mongo-perf
CAP-1670 mongo-perf startup params for mmap and wt
 CAP-1670 mongo-perf startup params for mmap and wt
missed a space in the arg passing to multicoll
minro typo
final MPERF_MULTI_COLL change
Merge branch 'release/r20141111'
CAP-1695 windows compatibility fixes
Update README.md

Added instructions for using the requirement.txt file
Update README.md