Pysoup

$ soup add` now accepts implicit versioning: by specifying nothing but
the name of the dependency, will append it with ‘*’ as the intended
version.

`$ soup add` now accepts a pip requirements.txt file as an input, and
maps the dependencies from it.

updates and fixes.

added the following:

`$ soup init`

`$ soup set`

`$ soup add`

supports `$ soup install`