Ignore images.*Path attributes, determine by baseName + idx dynamically

This brings us in sync with the production branch partially - the *Path
attributes are a huge dataset to load, actually.
Merge branch 'master' into production

Conflicts:
	meteor/client/compatibility/lf-render.js
	meteor/client/compatibility/ls-render.js
	meteor/client/templates/webgl/webgl.js
ls-render: Respect useAmazonData
Merge branch 'master' into production
lf-render: - redundant lf_baseurl
Hide the 'Data from Internet' checkbox, always useAmazonData true in production