bump to 1.0.3
fix #97 - visibility toggle bug

todo: write test for this case later, I'm sleepy right now
resolve #91 - bin zooms

* zoom in on first request of empty bin
* zoom to extent of all requests when loading non-empty bin
Merge pull request #98 from ngoldman/dev

bug fix & zoom feature request
Merge branch 'dev' of https://github.com/esripdx/geobin.io into tests