do not invalidate ALL caches when a schema is updated. #216

Instead we keep a separate reference file to be updated when schemas are
changed. A cache handler adds this file to all pages having schem

do not invalidate ALL caches when a schema is updated. #216

Instead we keep a separate reference file to be updated when schemas are
changed. A cache handler adds this file to all pages having schema
assignments.

Saving a schema feels noticably faster now (because JS and CSS no longer
are invalidated).

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fix importing into a new lookup schema

lookup schemas can now be created

added lookup selection in schema creation dialog

Use last file in config cascade

This last file is the one actually used to determine whether the cache
is still valid. DOKU_CONF . 'local.php' is not necessarily part of that
cascade

Invalidate the cache when a schema changes

So Schema changes are visibly immediately.

SPR-347

Use DokuWiki new autoloader for class files

No longer do we need to register our own autoloader. Namespace had to be
vendor prefixed.

Added way to delete a schema and all its data

added Schema Import #32

This also adds a nice interface for that to the schema editor

allow exposting struct schemas as JSON #32

moved schema listing to central place

make admin interface available to managers. closes #31

some localization

fixed bugs introduced by making admin components

also show a TOC on both admin pages to easily switch

Add an adminpage for schema<->page/ns assignments

Todo: The test if a page is in a namespace with an schema assigned is
not yet implemented.