Version 3.0.0b1 is up-to-date with GraphQL.js 14.5.6

Version 3.0.0b0 is up-to-date with GraphQL.js 14.5.0

Fix code coverage in Travis

The src path is already specified in .coveragerc

deploy via travis

Improve version info and bump version patch level

Switch PyPI badge to graphql-core

Add deprecation note to the docs.

Prepare version 1.0.5

Fix issues with Sphinx docs and add docs test

Prepare version 1.0.3