Merge pull request #488 from jaredbischof/develop

Updated text for the file types that our unpack function accepts.
m5nr download updates
api: add alias to m5nr
Merge pull request #489 from jaredbischof/develop

Edited search on home page to link directly to project pages.
bug fixes
Merge branch 'develop' of github.com:MG-RAST/MG-RAST into develop
m5nr change default
Merge pull request #490 from teharrison/develop

API and m5nr updates
Merge pull request #1 from MG-RAST/develop

sync
Change user count and link to tech report
Merge pull request #491 from mdsouza/develop

Change user count as well as link to tech report
Update preprocessing.r

edited version of preprocessing.r that includes removal of singletons as an option -- two new arguments:

remove_sg                   =TRUE, # boolean to remove singleton counts
                                  sg_threshold                = 1, # rows with a sum of counts equal to or less than this value will be removed if remove_sg=TRUE
Bug in solr query for users that are logged in and dont have star rights.