Revert back to rapidjson-0_11
Merge pull request #2 from trink/rapidjson-0_11

Revert back to rapidjson-0_11
Rename Histogram to HistogramSpecification
Merge pull request #3 from trink/rename_histogram

Rename Histogram to HistogramSpecification
Merge branch 'master' into metrics

Conflicts:
	common/CMakeLists.txt
	common/HistogramCache.cpp
	common/HistogramCache.h
	convert.cpp
Add basic metric data for each component