Update DWF_SERVER_VERSION to 3.1.1

Merge pull request #400 from michaelJustin/397-prepare-release-310

Bumped version to 3.1.0(-SNAPSHOT)

Update README.md for 3.0.6

prepare 3.0.5

Merge pull request #373 from michaelJustin/368-prepare-304-release

368-prepare-304-release

Merge pull request #361 from michaelJustin/358-prepare-303-release

prepared

3.0.2 release

Merge pull request #329 from michaelJustin/327-prepare-301-release

327 prepare 301 release

Merge pull request #317 from michaelJustin/316-prepare-30-release

316 prepare 30 release

Merge pull request #311 from michaelJustin/309-prepare-rc1

prepare rc1