Added option and separate subroutines for validating partially incomplete spreadsheets from Metazen Collect.  EP and library tabs can be empty, but project and sample information still is required.
Added option and separate subroutines for validating partially incomplete spreadsheets from Metazen Collect.  EP and library tabs can be empty, but project and sample information still is required.

wgerlach/pipeline,teharrison/pipeline,teharrison/pipeline,MG-RAST/pipeline,wgerlach/pipeline,teharrison/pipeline,MG-RAST/pipeline,wgerlach/pipeline,MG-RAST/pipeline