Add in location by default
New pluginsPath config, turn plugins array into a collection
Go back to 2-step bucket creation
Bugfix: Always focus first input in error group (ie. so slug doesn't focus for Title missing error)
Edit Entry updates

* Fixes for saving to content
* Don't include color as built-in fieldtype
* Use Plugin#inputView instead of Plugin#input
* Better error handling
* Enable Underscore templates for string-based views in plugins, cache function
Don't allow saving custom fields with reserved keyword slugs