Merge pull request #37 from wtangiit/master

add pipeline template mgrast-prod.template
Added Skip functionality to tasks
Adding file capability to Skip functionality
Fixing bugs: (1) Job didn't finished when task were skipped and (2) Skipped tasks were reported as init, instead of skipped
Fix bug: Failed workunits were hanging on memory
Merge pull request #38 from eberroca/master

Task Skip functionality
Merge branch 'master' of github.com:MG-RAST/AWE