Update readme.md
clean up and shuffle methods around
clean up, document, and shuffle methods around
Move field-specific methods from main class, and setup  property
Move field-specific methods to Fields class, and add group render/saving methods. Also new helper functions, , and
Handle repeatable groups
Merge branch 'trunk' into repeatable-groups
clean whitespace
Reorder code execution, and add `id()` method
Clean up repeatable fields methods, and Make wysiwyg field work with repeatable (kinda).
Clean up repeatable field group methods
Make JS concessions for wysiwyg repeatable. Still needs testing/bug fixing
JS should check for "wp" var before using
More specific selectors, and remove "widefat" class
__call method now takes a parameter to check for array keys, and set some group field defaults
Use new field group options for button text
Use new field group options for button text
Use our already created variable
Fix saving of 'file' type attachment ids
Class now takes a group field as an object vs args array