Merge pull request #14 from bamnet/master

Stop geocoding (start,end) address before finding directions.
typos
Merge pull request #18 from bamnet/master

Allow google-map-directions to work without a map, close #15.
remove sensor URL parameter since it is no longer required
Merge pull request #20 from brendankenny/master

remove sensor URL parameter since it is no longer required
Allow map to be centered on 0,0.