Fix #257

Add a table that stores delinquency ranges. Use this table when generating
charts on the dashboard.
Remove Accrued Interest (#271)

Physically delete the files from the repository (not only references in
the solution, as was initially done.)
Merge branch 'master' of https://github.com/PavelBastov/opencbs
Fix #257 (addition)

Adjust the SQL files and Objects.xml