Update to CANopenNode V4, add example "basicDevice", documented.

- Update to latest CANopenNode V4, newOD
- Remove obsolete canopend and canopencomm
- Wide tests on gateway and SDO communication, unfinished PDO, etc.
- Fully functional cocomm
- "basicDevice" example, well documented
- updated and documented tests
- Added tools folder

License to Apache

Merge pull request #14 from geoffrey-vl/master

increase buffer size, use malloc for large buffers

Merge branch 'master' of 192.168.1.30:git/CANopenSocket