Update marker rotations if they change after create

Setting the iconAngle marker property worked as expected on create, but not on update. Now it does.
Merge pull request #558 from grahamj/master

Update marker rotations if they change after create
Optimized example, thanks to @cachiconato here:
https://github.com/tombatossals/angular-leaflet-directive/issues/371
Fixed focus being ignored. Added truthy evaluation for popup content node. Fixes #560. Fixes #562
Merge pull request #565 from davidovich/Fix_issues_#560_and_#562

Fixed focus being ignored. Added truthy evaluation for popup content node.
Release v0.7.10
Better detection of valid bounds
formatting and shorter syntax for improved readability
Merge pull request #567 from capaj/master

formatting and shorter syntax for improved readability
Merge pull request #1 from tombatossals/master

merge