Custom Guide Shape

[NicholasMata]

Extends existing functionality to allow for a custom guide shape.

This is done through the use of a new interface called Targetable.

How it works

If the target view given to the GuideView constructor implements Targetable.

• boundingRect will be used to set targetRect property inside the GuideView class.
• guidePath will be used when onDraw is called in GuideView instead of always using drawRoundRect the canvas will call drawPath and will draw the guide path.

PS: I have added onto the sample application with a demonstration of how this works as well.

This implementation could be used to resolve issue #29

[mreram]

Thanks for your contribution, I will review this ASAP.

[mreram]

Please review my comments.

[NicholasMata]

If you could review again I made the requested changes. Let me know if I need to do anything else.