Update pom.xml and dorelease.sh to reflect latest changes

Still not perfect though.

Signed-off-by: Francis Galiegue <fgaliegue@gmail.com>
Convert README to markdown format; rename

Signed-off-by: Francis Galiegue <fgaliegue@gmail.com>
Add release notes file

Signed-off-by: Francis Galiegue <fgaliegue@gmail.com>
2.1.5

Signed-off-by: Francis Galiegue <fgaliegue@gmail.com>