Remote datasource

[smercier]

Add remote datasource function in scribre mapfile. This new feature could help in many case.

DATA: remote_data("http://smercp1.public.s3.amazonaws.com/data/my_data.zip","my_data_name",[force_download]="false")

This function should download data, unzip in project data directory and add it in mapfile.

Could be fun to have the same function for Web font source

url("font_url")

[dmorissette]

If support for remote data is added, please keep in mind the potential risk for malware injection through the remote file, cross-site scripting or similar type of vulnerabilities.

I'm not saying that we should not support remote assets, just that this needs to be done with care to prevent the possibility of Scribe becoming a vector for compromising servers, which would look very bad on the product.