v0.7.0

* api change release (API v6)\r
* Finished MySQL dialect implementation. MySQL 5.0.51b passes\r
  100% of tests.\r
* Added PostgreSQL dialect. PostgreSQL 9.0 passes all but\r
  the boolean-as-int tests.\r
* Added Db.dropTable(T) method\r
* Overhauled test suite and included more database\r
  configurations.\r
* Renamed StatementLogger to IciqlLogger\r
* Added IciqlLogger.warn method\r
* Added IciqlLogger.drop method