Update to work with tiddlyweb 1.3.0

which means using httpexceptor package
Merge pull request #3 from cdent/tiddlyweb-1.3.0

Update to work with tiddlyweb 1.3.0
Release version 0.8
update to use tiddlyweb 1.4.2 logging style

That style configures logging handlers for the 'tiddlyweb'
and 'tiddlywebplugins' namespaces. These can then be accessed
with a getLogger in plugin code.
Merge pull request #4 from cdent/tiddlyweb1.4.2

update to use tiddlyweb 1.4.2 logging style
release 0.9
Don't add the 'form' extension.

Extension are only needed for those serializations which work
with GET requests. Since form only works with POST (which _requires_
a content-type header), the extension is not needed.

As a bonus this means that it is more effective to use the list
of extension in markup for links to alternate representations (which
can be GET).
Release 0.10