Build a wheel binary distribution that includes ecCodes

[alexamici]

At the moment ecCodes must be installed on the system for cfgrib to work.

Following thew strategy of https://github.com/mapbox/rasterio it would e possible to package the whole ecCodes library and data files in the multilinux wheel binary package.

Pro:

• no need to have two install steps, only pip install cfgrib
• no need to install ecCodes as root

Con:

• huge binary wheel package
• possible conflicts with other Python packages that link to ecCodes (quite remote)

The infrastructure used by rasterio is here: https://github.com/sgillies/frs-wheel-builds

[alexamici]

I started a new repo for the low-level ecCodes bindings that will address this issue ecmwf/eccodes-python#1. Closing here.