Release version 0.5.4

Fix bugs:

1. Use template specialisation in the correct way to avoid always returning as if it were a 500 error.
2. If path already starts with / then don't add a second one when normalising the request URL.

Release version 0.5.3

Fixed bug with rate limiting code - wasn't using the same key for fetching and updating memcached.

Release version 0.5.2

Fixed bugs with OAuth database connection and environment variable parsing. Thanks @tomhughes!

Release version 0.5.1

Fixes integer types so that 32-bit builds work.

Release 0.5.0

Adds support for changesets (metadata) and authenticating requests with OAuth. Rate limiting is done per-user on authenticated requests, allowing multiple users behind a single NAT IP to have their own individual rate limits.

Release version 0.4.3

Added a simple manual page. Updated some documentation after the binary name changed in the previous release.