Release v0.2.0

And now for something completely different... (#18)

* Added logic to remap pb_block blocks to patterns upon save.
* Fixed delete methods
* Change the pattern slug to include/not-include theme namespace when switching from theme to user or user to them
* Fixed bugs related to switching patters from user to theme
* Added Creation tools to side panel
* Refactored editor assets to be in more correct locations
* Moved source and synced into their own panels
* Only return a pb_block pattern if the file exists
* Moved create panel into a component
* Got side panel browing working
* Added documentation to wp-admin
* Fixed pattern insterter unit test
* Upload assets to media library for user pattern conversion
* Add image pattern for testing
* Add test for theme->user conversion of patterns with images
* Fix image asset copying when patterns are converted.
* Process theme pattern content when updating so that updated file have necessary PHP but database posts and responses do not
* Add many image assets for testing
* Fixed a bug with pattern theme->user conversion with cover blocks
* Only add 'hidden' or 'uncategorized' categories when necessary
* Version Bump to 0.2.0