Add RSS feed for new Boost releases

- Add get_absolute_url to version model
- Add versions RSS feed
- Fix date method, add Atom feed
- Add link to RSS feed on releases page
- Add docs and reorder links

docs/README.md

@@ -5,8 +5,11 @@
 - [Development Setup Notes](./development_setup_notes.md)
 - [Environment Variables](./env_vars.md)
 - [Example Files](./examples/README.md) - Contains samples of `libraries.json`. `.gitmodules`, and other files that Boost data depends on
-- [User Management](./user_management.md) - Describes how we allow authors and maintainers to "claim" the accounts that we create for them as part of the library upload process, and how to prevent users from updating their own profile photos.
+- [Hosting](./hosting/README.md)
+- [Mailman](./mailman/README.md)
 - [Management Commands](./commands.md)
-- [Retrieving Static Content from the Boost Amazon S3 Bucket](./static_content.md)
-- [Syncing Data about Boost Versions and Libraries with GitHub](./syncing_data_with_github.md)
 - [News and Moderation](./news.md)
+- [Retrieving Static Content from the Boost Amazon S3 Bucket](./static_content.md)
+- [RSS Feeds](./rss_feeds.md)
+- [Syncing Data about Boost Versions and Libraries with GitHub](./syncing_data_with_github.md)
+- [User Management](./user_management.md) - Describes how we allow authors and maintainers to "claim" the accounts that we create for them as part of the library upload process, and how to prevent users from updating their own profile photos.

docs/rss_feeds.md

@@ -0,0 +1,10 @@
+# RSS Feeds
+
+## Releases RSS Feed
+
+The `RSSVersionFeed` class controls the RSS feed for new Boost releases.
+
+**URLS**:
+
+- `/feed/downloads.rss` to replicate the original URL
+- `/feed/downloads.atom` to publish an Atom version