Merge pull request #94 from codalab/pliang

better output for cl run
Merge pull request #99 from codalab/pliang

consolidate second-pass lookup of values inside files to server call interpret_file_genpaths
guard against non-existent bundles
fix -f args bug
quote command
sort dependencies alphabetically
Merge pull request #102 from codalab/pliang-hierarchical-worksheets

allow (sub)worksheets to be worksheet items, and resolve worksheet refer...
Merge branch 'master' into pliang-docker