Drag-and-Drop support for formats that read arraybuffer sources
Add TextDecoder to polyfills
Add custom Drag-and-Drop examples for KMZ and MVT
Add sample download and KML styles option to existing example
Test arraybuffer and constructed formats
Use latest version of prism, add json formatter, copy to clipboard plugin,
and line-numbers.
Now the clipboard js is automatically loaded by prism it it not included
and the buttons are automatically initialized. Though I added some css to
match the previous style.
This is based on the assumptions that
* our examples always goog.require something ol.* (otherwise why have the example)
* our examples only goog.require exportable symbols or "namespaces" for exportable symbols (e.g. ol.control for the defaults function)
* we have an API doc page for each exportable symbol and each "namespace" that has exportable symbols (e.g. ol.Map.html and ol.control.html)
It may be that this assumption proves to be wrong, but it would be nice to avoid the extra network traffic and layout shifting when examples load.
Please write blog posts, create tutorials, or develop workshops that show off cool ways to develop applications that use OL3. The examples should be kept very simple. This download functionality is neat, but it's really a gratuitous use of non-map related functionality. While it does demonstrate the use of `format.writeFeatures()`, this is buried in too much additional code that is not accessible (buried in resources/common.js) and not really related to mapping things. If we want to have examples that demonstrate how formats can be used to serialize features, a simple textarea would suffice as the target.
