Layer refactoring, Full Feature/Vector layers support, Selection features, Major Style refactoring

[lolochristen]

• Full support for vector layers
• Refactoring of Layer to support Shapes per Layer
• Shape/Drawing and Marker Layer are added on demand part of Layers collection
• Shape Selection feature with events on Layer
• Automatic update on a parameter change on layers and shapes

[lolochristen]

Also fixes #62

[lolochristen]

• Major refactoring to use StyleOptions only for full customization