Refactor hello_trema.feature in order to delete stop_trema() and shutdown!() from .c and .rb (refs #247)
Merge branch 'develop' of https://github.com/trema/trema into develop
Refactor "I run" step not to use relative paths (refs #247)
Do not build hello_trema with Rantfile, since it is built in hello_trema.feature (refs #247)