[ticket/258] U_ACTION should be B3P_U_ACTION for calendar events

B3P-258
[ticket/258] Slightly improve calendar code and update copyright

B3P-258
Merge pull request #259 from marc1706/ticket/258

[ticket/258] U_ACTION should be B3P_U_ACTION for calendar events
Use new testing framework, weeeeh
Ignore SQLite3 errors for now
Merge pull request #260 from board3/ticket/12483

Use new testing framework, weeeeh