Cleans up formatting and imports
Adds type-checking getters to LocalDocument.
Adds method for appending values to content fields without type-checking.
The regex stage now loops through all configs even for a document that is missing the input field for one of them.
Merge pull request #282 from andreassalomonsson/continueregex

Continue instead of return in RegexStage
Merge pull request #275 from laserval/localdocument-utility-methods

Adds utility methods for getting and appending to content fields