Previously, generation of next/previous links would discard any existing
query parameters. This commit introduces a dependency on URLObject, which
is used to intelligently parse and modify URLs to ensure existing params
are preserved.

Addresses issues #107

Change 'except' for 'except Exception' (Fixes issue #75)

Only set the script_prefix if the prefix isn't already a full URL.

Get the nice colouring sphinx provides and fix some more typos.

with an api.

change the key name "field-errors" to "field_errors".

to stay in sync.

as "-" is not allowed as a part of key name in javascript