add docker exec helper, rename spawnSeries to dockerLib
refactor init: change spawnSeries require to docker
add in lifterShell.printCommand()
Merge pull request #237 from gregerg/feat/docker_exec

add docker exec command, add lifterShell.printCommand()
add correct file path for app.sh
Merge pull request #240 from youreddy/ammendDeployScript

add correct file path for app.sh
handles mongoDB by using small files option