First draft of netstring support

It is ugly, it probably doesn't work in most cases, but it's a beginning. Tests will follow after
some cleaning up.
Cleanup plus documentation of netstring client
Fix logging
Better representation of errors
Decode the response in netstring client
TODOs for future work
Merge branch 'master' into netstring

Conflicts:
	fastjsonrpc/client.py
Merge branch 'master' into netstring
Don't use attribute for what could be a variable
TODO with description of an error
Enable logging in example
Call two methods in netstring example (triggers an error...)
Fix error with multiple calls of callRemote.

Each callRemote call returned the same deferred, which obviously prevented multiple calls.
Now we return a new instance instead. Unfortunately we need to call responseReceived
for each response, so we made a 'custom' Deferred subclass for this. Not the best solution,
but it works - might refactor it in the future.
Default to no timeout (socket default)
Call example method that doesn't get an exception
Basic tests of netstring server
Some notes about testing
Add forgotten import of adbapi
Make MySQL connection details configurable
Merge branch 'master' into netstring