update basemap styles
DRYer attribution styles, add new basemap styles
cleanup
add events to layers
cleanup event names and build
fix merge conflict
remove unneccessary event mixins
Merge branch 'master' of github.com:Esri/esri-leaflet
rebuild
add metadata event to other layers
update built files
Merge pull request #134 from patrickarlt/master

Pre RC 1 updates