Merge pull request #494 from paczian/master

minor bugfixes
Merge pull request #495 from paczian/master

fixed missing params from last update
add pipeline options to output
Merge branch 'develop' of github.com:MG-RAST/MG-RAST into develop
fix to pipeline options output
Merge pull request #496 from teharrison/develop

api: add pipeline options to mg output
api: bug fix to metagenome paramater output
Merge pull request #497 from teharrison/develop

api: bug fix to metagenome paramater output
fix divide by zero bug
Merge pull request #498 from teharrison/develop

fix divide by zero bug
api: add required id to doc
Merge pull request #499 from teharrison/develop

api: add required id to doc
fix overview piechart negative values
Merge pull request #500 from teharrison/develop

fix overview piechart negative values
api: fix response for unknown id
Merge pull request #501 from teharrison/develop

api: fix response for unknown id
defaulting site_name to Metagenomics