Ads missing export card config view titles
Adds changelog entry
Changed the copyright message.
Merge pull request #6 from finnlabs/copyright-update

Changed the copyright message.
WIP. config accepts custom_field property and checks model for custom fields if it's true. not tested at all.
Can now display custom field data on cards.
Merge pull request #5 from finnlabs/fix/view_titles_4024

[FIX] View titles 4024
Added further validation to per_page field of configs to ensure positive numericality. Took the opportunity to write some better specs to test validation.
Added locales for export config yaml error messages.
No longer need to have custom_field property on config, it just looks on the model to see if it has one.
updates changelog #4157
Merge pull request #10 from finnlabs/bug-4157-per-page-negative-integers-validation

Added further validation to per_page field of configs to ensure positive...
Further checks for badly formed YAML.
Moved yaml error message into locales.
Rows text area has wiki-edit class.

This makes it full width although i don't know if we want to give it it's own class.
Changed german locale.
Updated readme.
Property "height" can now be set for a group.
Added description field to export card config model.
removes required mark from non required field