added schema headers to output

skip empty fields in output #44

do not render empty values. closes #44

be more robust when called with unknown types

this happens when you switch branches mostly

use autocompletion for pages too. implements #7

User type now uses a single input for multiple users

This makes handling the autocomplete somewhat easier. I couldn't get it
to work properly with our template duplication stuff.

introduced new abstract type to streamline multiedit fields

no need for full length namespaces

make language strings easily available to types

render user name correctly

added validation for User type

fixed tests

fixed deleting patterns

fixed assignment listing

finished implementing auto completion

add default class to all inputs

allow types to define their own AJAX backend

properly handle the isEnabled status in SchemaData

fixed jsoneditor with renamed form element

fixed tests that were affected by rescent merge that renamed methods

toggle and remember fieldset state in editor

fix heisenbug related to splitbrain/dokuwiki#1484

Add incomplete test for diff view

Github Issue #35

Add an incomplete test for revert action

As stated in the markTestIncomplete-message: We would need a
valid-security token at least for the revert request.

Github Issue #35

make sure search only returns assigned schema data