'work-in-progress-daan-2013-06-05-idn-rd-wr-ok.diff'
This branch is now based on the sercos branch.

(previous commit was incomplete...)

A few improvements from the Vitsch Electronics CVS
Use log_send() for all logging and add context (DEBUG/WARNING/ERROR) info.
A little bit more comments

Mostly ethercat related in the ec directory.

The controller_load functions will set it to the .ctrl filename.
Modifiy dumpdot to use it to make subgraphs. This way we get a nice
grouping of blocks per file.

Ghost terminals still need special attention, but most blocks don't
use them and use the same malloc + initialize pattern.