Fix two bugs about insufficient and premature cleaning.
Making PEP8 happy.
Factor the retrieval of the psycopg2 connection in a dedicated method.
Documentation: use "database" instead of "cmsdb".

This alignes the documentation with the example configuration.
Use a better way to drop the whole database.

Unfortunately it requires one small step more when creating the
database. I don't think it is too invalidating, though...

Fix #153.
Fix a couple of my copyright years.
Remove an unused import.
Write the machinery required to make Importer and Reimporter fully modular.

Now there can be many loader, selectable at run time, with also
the possibility of autodetection.
Create a base class for all loaders.
Fix some details in the interface between (Re)importer and Loader.

Also, fix a bunch of nasty bugs in Reimporter connected with
task ordering and not violating unique contraints.
Fix docstrings in BaseLoader.

This last commit should fix #71.
Support English names in YamlImporter: first half.

Start tackling issue #155. Some work is still left: it's not hard,
but now I'm tired...
Support English names in YamlImporter.

Fix #155, although admittedly the fix is not thoroughly tested.
Update docs about Importer and Reimporter.
Fix "text" to "statement".

Which is more consistent with the rest of CMS.
Add key 'primary_language' in YamlLoader.
Fix interaction between cmsMake and YamlLoader.
Async: remove support for binary responses.

They're not used and simplifying the protocol may help towards
restructuring the IO model underlying CMS.
Start writing some docs about RPC protocol.

This is only the beginning: unfortunately I just noticed a nasty
bug which I prefer to take of immediately.
Async: remove some unused code.