Updated changelog and simplified migration
Removed files belonging to documents
Removed document attachments
Removed attachment mailer function
Removed translations, permissions and menu entries
Removed more documents code from the core
some fixes to the tests to make the the document-mailings work again
now checking the right number of notifiables.
Removed routing test
removed the left-over attachments, that remained dangling after removing the documents
removed some left-over puts
Removed cross-project textile tests
Also removed document factory
Removed some document-related tests/fixtures
Removed references to the documents-module in the test.

The references have either been removed (e.g. from the list of installed
modules) or replaced by another module (e.g. use news instead of
documents as the inactive module of the test.)
Removed the test for the documents-association.
Removed documents block from My Page
Removed document related custom fields helper,
cuke step and default data from core
Added gem_name field for registered plugins
Used issue as attachment container instead of document