fix(jqLite): throw when jqLite#off called with 4 args

Closes #3501
fix(docs/error): make minerr ids searchable

Closes #3513
docs(ngModel): clarify docs for NgModelController#

Closes #3498
fix(angular.copy): change angular.copy to correcly clone RegExp

angular.copy previously copied RegExp as an empty object. Change detects
RegExp instance and clones into new RegExp. This change is based on a previous
fix to allow Date to be copied.

Closes #3473
Closes #3474