update gitignore
add local gh-pages checkout to gitignore
consistancy in static attributions
identify doc updates

added info to README about calling identify and changed default sr from
'4265' to '4326'
Merge pull request #110 from jgravois/master

identify doc updates
Merge branch 'master' of github.com:Esri/esri-leaflet
fix broken submodule
Merge pull request #111 from patrickarlt/master

Small fixes