Bugfix, add missing table drop and end command timer
Bugfix, correct sql statement when using sqlite and removing a column, depending whether a column has type containing a comma or is positioned in the middle or end of the statement.
Bugfix, when using sqlite and changing a column a comma was missing when the changed column is in the middle of the statement.
Merge pull request #312 from fabu-gharbieh/0.3.x-dev

fix bugs in sqlite adapter