-- removed start/end date - only used for columns that show hours logged per user
-- Hours per user logged are not shown anymore, not user friendly.
   besides infrmation can be obtained from other report more conviniently
-- Added balance reported hours / billable hours
-- adjusted comments
-- fixed calculation "Balance Reported Units/Billable Units"
   ... it was just because my coffeine level was too low ... :)
-- Filter rels invoive_id/project_id, only get projects
   An implementation returned other object types related to an invoice, e.g. user group
-- Invoice would not get related to project when creation was triggered out of project context
Merge remote-tracking branch 'intranet-invoices/master'
Merge remote-tracking branch 'intranet-reporting/master'