Cmd code review feedback
Merge pull request #9 from Clever/worker-wrapper-cmd

Worker wrapper cmd
Minor argsparser refactoring

This change separates the write creation / writing into a separate
function to make the code a bit more elegant.

It also removes the file because we occasionally run out of space in
/tmp
Merge branch 'master' of github.com:Clever/baseworker-go into worker-wrapper-cmd-line

Conflicts:
	cmd/taskwrapper/README.md