CmdAdd

- Removed TDB2::commit.
- Removed unnecessary return code.
CmdAnnotate

- Removed TDB2::commit.
CmdAppend

- Removed TDB2::commit.
CmdBurndown

- Removed TDB2::commit.
CmdCalendar

- Removed TDB2::commit.
CmdCount

- Removed TDB2::commit.
CmdCustom

- Removed TDB2::commit.