fixes order by exploit
expanding sortcolumns
Merge pull request #30 from wisepotato/2.2

fixes order by exploit
Update changelog.

Signed-off-by: crynobone <crynobone@gmail.com>
Merge branch '2.2'

Signed-off-by: crynobone <crynobone@gmail.com>

Conflicts:
	src/Html/Table/Grid.php