tag and release for v1.27

Hi Teunis,

The newer EDFbrowser 2.12 apparently relies on edflib 1.27 to operate properly. In Debian we ship the libedf as an independent package instead of building edfbrowser with its embedded edflib, but the latest version we are capturing from the edflib project homepage is still the 1.26. I'm under the impression that the git repository in its current state ships version 1.27. Please could you tag and release the standalone edflib version 1.27?

Have a nice day, :)
Étienne.