CAPX-32 Add helper function to load importers by mapper.
CAPX-32 Display a list of importers using this mapper on the mapper delete confirm form.
CAPX-32 Disable delete button when importers are using this mapper.
CAPX-32 Link to the importer entites.
CAPX-32 Simplify the load by mapper helper.
CAPX-32 Use API method to get machine name.
Merge pull request #1 from Trellon/CAPX-32

Capx-32
CAPX-25 Provide a way to filter out unwanted field properties from the mapper form, starting with input format.

Use a "constant" (global array) for excluded field properties.

Skip non-existent column keys for relation module to prevent PHP notices.

Add attributes to the field property exclusion list.