Analytix

The rewrite is finally done! There are too many changes to mention them all here, but there is a [migration guide](https://analytix.readthedocs.io/en/latest/info/migrating.html) to help you switch your project(s) from version 1 to version 2.

This should be the final dev release before 2.0.0 stable (in fact, there may be no changes between now and then). This update mainly focussed on docs.

This will likely be the last major update before documentation in dev7.

**Changes**
- Added playlist report types
- Fixed broken report types
- Made the verifier more robust
- Made the verifier check sort options in the same way as metrics

**Changes**
- Removed numpy array stuff
- Re-added raw data output (`self.data`) to report class
- Re-added `to_json(...)` method to report class

**Bug fixes**
- Fixed a bug that converted numerical values to strings
- Fixed a bug where presenting an invalid filter value to a report type with a required filter would raise a `KeyError` rather than `InvalidRequest`

WARNING: This release contains extensive breaking changes.

- API requests are now handled manually
- The number of dependencies has been significantly reduced
- The service and analytics objects are now one combined object
- The API token is now stored (unless the user wishes otherwise) for future use
- A bug where queries would error through the API if reports that required sorts were not sorted in descending order has been fixed
- The `report.to_json` method has been removed
- If numpy is installed, np arrays are used instead of lists of lists to store data within the report object
- The retrieve kwargs have been rejigged to make it clearer which elements are necessary
- The verification files have been cleaned up

This release is largely undocumented. You will need to view the source code to work stuff out, or stick with v1.2.1 for the time being.

(Originally released 14 May)

- Fixed some typos
- Added some utils