Add basic Usage Record Endpoint
- Supports Category 'Calls' (default) and 'SMS';
- Supports Subresources 'Daily', 'Monthly', 'Yearly', 'AllTime', 'Today', 'Yesterday', 'ThisMonth', and 'LastMonth';
- Supports StartDate and EndDate parameters;
Add Analytics Charts to Dashboard
- Making use of Usage Records endpoint for generating last 30 days charts;
- Calls chart shows both number of calls and duration for each day;
- Messages chart shows number of messages for each day;
Merge branch 'brainslog-USAGE-ENDPOINT-PLUS-CHARTS' into ghub_master_mergedUI
Removed System.out.println
Changed version of hsqldb to 2.3.2, removed it from ant build script