Merge pull request #1 from linkedin/master

sync with upstream
Added corelation directives in the example
Supports corelation directives from config files
Publish another csv with important sub-metrics for use by summary report
Merge remote branch 'origin/master'
Minor updates
Urgent fix for dygraphs
Merge remote branch 'upstream/master'
Updates based on feedback
get_csv updates on other metrics
bug fix in normalize method
Merge pull request #15 from SharadGandhi/master

Corelation Support for config graphs directive
Merge pull request #16 from RiteshMaheshwari/master

Publish another csv with important sub-metrics for use by summary report

lgtm
added a local http server to test httpdownload component; added more info output if metric name is invalid