Fix the Epoller licences.
Default the log level in tests to INFO.
Make the tests pass with the select() implementation.
Fix a comment and a lint warning.
Fix a build error with the epoller.
Fix a memory leak in the new EPoller
Reuse EPollDescriptors.
Switch to using StringToBool
Merge branch 'master' into epoll
Address Peter's comments from the code review.
Merge branch 'epoll' of github.com:nomis52/ola into epoll
Merge pull request #422 from nomis52/epoll

Add a new Poller implementation that uses epoll rather than select
Make the tests pass on systems without epoll.