Pull path to bash from env

On OpenBSD bash is installed in /usr/local/bin
Fixed some typos.
Updated unit tests to generate new lfetool.
Merge pull request #13 from qbit/master

Pull path to bash from env
Merge branch 'master' of github.com:lfe/lfetool
Applied Aaron Bieber's change to the template file.

This is what generates the lfetool script, and needed to be changed here,
rather than in the generated script. I should have caught that during review --
apologies!