* refactors documents and file upload to be distributed into different subfolders, depending on the type of document (InterventionDocument, RevocationDocument, ...)
* refactors Document model into AbstractDocument
* subclasses RevocationDocument, InterventionDocument, COmpensationDocument, EmaDocument and EcoAccountDocument from AbstractDocument to provide proper functionality for each
* adds new specialized routes for each new document type (opening, removing)
* drops generic get and remove routes for documents
* fixes created timestamp in detail views where modified needs to be displayed
* adds fallback timestamp if data has not been edited, yet --> show created timestamp
* fixes bug where deleting of certain data didn't redirect to the index view
* adds quality_check() method for EMA, needed for recording
* adds all functions which are provided for compensations to EMA
* adds/updates translations
* adds Ema model (basically Compensation inherited)
* adds index view for EMAs
* fixes drop-down link bug for menu 'More' in navbar
* refactors some more forms to use process_request()
* adds modified attribute to BaseResource for easy last_modified check
* adds setting of modified attribute in all places where UserAction.EDITED is added to log
* adds EMA_ACCOUNT_IDENTIFIER_LENGTH and EMA_ACCOUNT_IDENTIFIER_TEMPLATE to ema/settings.py
* adds EmaAdmin to ema/admin.py
* fixes wrong title in intervention detail view html for revocations
* adds support for subtitle variable to BaseTable and generic_index.html
* drops next_version attribute from models
* adds/updates translations
* adds default ordering for UserActionLogEntry
* removes extra ordering in log modal rendering
* adds eco-account own includes for simpler maintainability instead of refactoring to generic includes for compensation app and predefining urls and stuff on the backend
* adds before-state, after-state, actions, deadlines, documents and withdraws to eco account detail view
* adds hint for invalid withdraw in intervention detail view in case of deleted eco account
* adds/updates translations
* adds detail view for eco account
* adds withdraw detail view to eco acount detail
* generalizes compensation/includes templates to be reusable for eco-accounts
* moves is_shared_with() check to class BaseObject
* adds/updates translations
* reduce compensation/views.py file size by splitting into three sub view files in compensation/views/xy_views.py for compensation, eco-account and payment
* restructure urlpattern list by splitting into three smaller lists for a better overview and maintainability
mipel