Enable specifying values 'ASC' and 'DESC' for the direction of sorting when using DB_FileMaker_FX class
Rename _adjustDirection() of DB_FileMaker_FX class to _adjustSortDirection()
Merge pull request #80 from msyk/adjust-sort-direction-for-filemaker

Enable specifying values 'ASC' and 'DESC' for the direction of sorting when using DB_FileMaker_FX class