Update Elasticsearch 1.3.4 to 1.4.2
Replace log4j loggers with logback loggers through slf4j facade
Merge pull request #2267 from dennishendriksen/feature/elasticsearch_1.4.2

Update Elasticsearch 1.3.4 to 1.4.2
Merge pull request #2268 from dennishendriksen/feature/logback

Replace log4j loggers with logback loggers through slf4j facade
Bug fix: define charset for Scanner
Merge branch 'master' of https://github.com/molgenis/molgenis