GeoView beta 7.1

Can use GeoViewElement mouse zoom and map tiles with Bloc layout constraints and placement.

What's Changed

• Fix #111 + add rectangles examples by @LabordePierre in #112
• Scale refactoring by @LabordePierre in #114
• Layers now uses TSmockHaveProperties by @LabordePierre in #116
• Fix issue #117 by @LabordePierre in #118
• Fix #119: can add BlElement as a child in a GeoViewElement using it t… by @LabordePierre in #120
• Fix tiles layer and zoom when GeoViewElement is not displayed at 0:0 position on its parent by @LabordePierre in #121

Full Changelog: beta7...beta7.1