Add url to donate page

Add url to donation page from 'thainks' template.
Add uploaded image preview

Show a thumbnail of the captured image in a grid below the
'Add photo' button.
Insert WildlifeID as string

Change insert statment to save WildlifeID as string instead of int,
as this was breaking the public api.

Also modified the address_view object to concatenate the street and
suburb fields together so that they were saved as a single
address string in the db.b
Add site header and project summary to landing page

Add 'Wingtags' as a header and explanatory paragraph to
the form view.
Inital work on api tests
Add iOS + Chrome mobile web support

Add header tags for iOS and Chrome variants of
'mobile-web-app-capable' and the wingtags logo at the following
resolutions:
76x76
128x128
196x196
Trivial change to increment commit for testing
Remove 'require pry' from observations controller

Was a vestigal dependency from some debugging I was doing and,
of course, it blows up in production as pry is only available
in the dev/test environment.
Generate file name for s3

Compose S3 file name for image in the following format:
'images/' + UUID + extension.
Enable S3 image upload

Change backbone form to send multipart data, and change
Observations controller to accept multipart form and
upload the image to S3 if it is present.
Remote S3 image upload and use wingtags.api instead

Remove call to Amazon sdk and add rest-client gem to make
multipart api call to api.wingtags.com/images to upload form
images.