various: remove the "dyncall", its tests and mentions in text-files

I hopefully got everything... looked for:

- git grep functions
- git grep DYNCALL
- git grep dyncall
- git grep test_ruby

still compiles, and all test-suits still pass (tested with the fixed
"try-to-fix-testsuite" branch).

Signed-off-by: Martin Zenzes <martin.zenzes@dfki.de>
ruby/test_value: readd testing of nan (float+double)

as suggested by sylvain

Signed-off-by: Martin Zenzes <martin.zenzes@dfki.de>
README: remove more mentioning of dynamic binding

Signed-off-by: Martin Zenzes <martin.zenzes@dfki.de>
Merge pull request #9 from jmachowinski/remove-dyncall

various: remove the "dyncall", its tests and mentions in text-files