Tweaking the fixture generation script to provide some output on what it is doing.

Added in the ability to take in environment variables to specify where the vendor folder is, shard to use, API URL to use.
Using default language when setting up client
Send shard to file write function
Derp
Adding API Version as overrideable in fixtures generation
Generate all the fixtures
Merge pull request #3 from turbine-web/fixture-generation-updates

Fixture generation updates