Revert "Add digest and parsereq vmods"

This reverts commit 0b71b0f416b5e84102afb9fa221b96773e2b6509.
Revert "Add support for compiling vmods into the varnish cookbook"

This reverts commit 29eb70c292cc0f4810276862d358d29cfa8c6064.
reverting adding of vmod, it now exists in the tests branch

refrencing #35
cleaned up tests as well
fixes #31