* adds support for payment adding/deleting to intervention log
* adds support for deduction adding/deleting to intervention/ecoaccount log
* improves code snippets
* drops add_deduction() methods for ecoaccount and intervention in favor of simpler creation in NewDeductionModalForm
* adds messages
* adds/updates translations
* removes admin backend views which are not important for production
* adds filtering functionalities on index views
* simplifies detail views on intervention, compensation, ecoaccount and ema
* adds autocomplete fields on detail views
* adds handy horizontal filter fields on detail views
