guard logic around determineWorkerENV (#60)
guard logic around determineWorkerENV (#60)

* removed teraslice logic

* cleanup

* fixed worker type bug

* guard logic around determineWorkerENV

jsnoble/teraslice,jsnoble/teraslice,terascope/teraslice,terascope/teraslice,terascope/teraslice,terascope/teraslice,jsnoble/teraslice,jsnoble/teraslice,jsnoble/teraslice