use grid_id from url instead of filename. grid_id is taken to be any string from start of URL not containing forward slash. Hence filename may be appended to end of URL for nice downloads e.g. http://hydro.local:3000/530f5929904fa07777f50743/image_name.jpg
error handling when extracting grid ID from url, support for env DEBUG (prints url + resulting grid object id
minor code neaten
support all args passed on cmdline (no config file required) - set all unspecified to defaults
more informative error message if problem connecting to mongodb
config - remove default, replace with .example
indenting
add exmample upstart script
update REAMDE
REAMDE update
update REAMDE
REAMDE update
package.json update to point to this fork's repo
Merge pull request #1 from rdkls/master

UpDated readme.md