Add linestart property

 - Roundline is currently drawn as outline

Signed-off-by: James Tasker <james_tasker1@hotmail.com>
Add Meter types to Meter classes

Signed-off-by: James Tasker <james_tasker1@hotmail.com>
Implement solid Roundline drawing

Signed-off-by: James Tasker <james_tasker1@hotmail.com>
Implement start and rotation angle in Roundline Meter

Signed-off-by: James Tasker <james_tasker1@hotmail.com>