add config option for node
Merge pull request #155 from thousandsofthem/add-config-for-node

add config option for node
Set Environment variables via worker file
alias
Merge pull request #156 from thousandsofthem/add-env-vars

Set Environment variables via worker file
No need for alias.
allow simple pip package version
Merge pull request #157 from thousandsofthem/pip-simple-version-format

allow simple pip package version
wrong variable name
Merge pull request #161 from tamoyal/master

wrong variable name
Version bump.
Minor 1.8 compat fix.