Add new tasks to README

... and do some additional formatting.
Improve testflush, testinit and testautodetect

libarduserial/arduserial.c:
* ser_autodetect :: Improve pattern for automatic arduino serial
  detection
testsuite/arduserial/testflush.c:
* main :: made output prettier, use ser_autodetect instead of guessing
  that the arduino is on /dev/ttyACM0
* evaltest :: implement test evaluation procedure, althought don't use
  it yet
testsuite/arduserial/testinit.c:
* evaltest :: implement test evaluation procedure
* test_invalidDevice :: move test that was living in main before to its
  own procedure
* main :: use evaltest to call tests
testsuite/arduserial/testautodetect.c:
* main :: test cannot fail, only skip and pass are possible right now
Remove markdown version of README

Also add new tasks to README.
Merge branch 'master' into development

Pull versioning fix into development branch
Rename README to README.org
Merge branch 'master' into development
Remove todo section from README.org

We will use the issue tracker from github from now on.
Fix autotools breaking bug in Makefile.am

Rerenamed README.org to README to be gnu complient.