Replace Meter dictionary in Skin with a List

Signed-off-by: James Tasker <james_tasker1@hotmail.com>
Add ability to change position of meters

Signed-off-by: James Tasker <james_tasker1@hotmail.com>
Add event handler to update meters when they are edited

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