Adios png! HelloOOOoooo icon font!
Add parse_widget_id() helper method to PHP from JS
Simplify direct widget instance model updates

Instead of passing a JSON-encoded instance_override POST var, populate
the Ajax POST vars with the vars as if they were coming from the
.widget-content inputs

Account for case were widget_number is 0
Sanitize widget instances for customizer

 * Ensure that instances saved to DB are sourced via widget update callback function
 * Serialize widget instances to JS in a way which preserves the non-JSON compatible dat.
 * Remove dead code related to tallying widget instances
 * Refactor update callback logic
 * Add method for parsing a widget setting ID, refactoring duplicated logic

Fixes #28
Send previously-sanitized instance when model changes

Clean-up after the input vars are manually set when a sanitized instance is provided
Throw exceptions instead of alerting errors
Base64-encode serialized instances to protect backslashes in strings
Add temp filter to JS-sanitize old settings revisions
Merge pull request #70 from MichaelArestad/master

Use vector fonts instead of raster images for widget icons

Adios PNG! HelloOOOoooo icon font!
Remove widget_icon_url filter and reference to PNG icon

Follow-up to #69 and #70
Bump version 0.13
Update latest news intro paragraph
Fix link to changelog
Bump date for 3.9 cycle
Bugfix: change keydown to keypress whenhandling keypress for available-widgets
Merge branch 'fix-wrong-event-name-keypress-keydown' of https://github.com/knishiura-lab/wp-widget-customizer into develop

Closes #72
Remove negative mergin on widget