Add `Orchestra\Html\Table\Grid::paginated()` helper method to access pagination state for current table.

Signed-off-by: crynobone <crynobone@gmail.com>
Improve docblock and code consistency.

Signed-off-by: crynobone <crynobone@gmail.com>
Add testcase for meta data.

Signed-off-by: crynobone <crynobone@gmail.com>
Merge branch '2.1' into 2.2

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

Conflicts:
	src/Html/Form/FormBuilder.php
	src/Html/Table/Grid.php