COUNT statement

[bbrakenhoff]

Hi,

I posted another issue #48 where you asked me to split my features in different issues, so this is the first one.

I wonder if you could find a way to easily make a select count statement like below :).

"SELECT COUNT(*) " + "FROM " + MOVIE_TABLE + " " + "WHERE " + MOVIE_ID_TRAKT + "=?";

[EmmanuelMess]

Also please add support for other functions, like SUM() and AVG().