Merge pull request #539 from emmanuel-keller/1.6

1.6
Merge pull request #540 from emmanuel-keller/1.6

Clustering: Distributed indexation and index reload with querying from any node works!
Merge pull request #545 from emmanuel-keller/1.6

1.6
Merge pull request #549 from emmanuel-keller/1.6

Fix MoreLikeThis WebService pattern
Merge pull request #553 from emmanuel-keller/1.6

MoreLikeThis query sorted in score descending order.
Merge pull request #556 from emmanuel-keller/1.6

MoreLikeThis API returns query string
Merge pull request #559 from emmanuel-keller/1.6

Error message on invalid OPENSEARCHSERVER_DATA environment variable
Merge pull request #563 from emmanuel-keller/1.6

Implements issue #561
Merge pull request #568 from emmanuel-keller/1.6

1.6
Merge pull request #571 from emmanuel-keller/1.6

Add additionnals libs for the external parser
Merge pull request #576 from emmanuel-keller/1.6

Support of specific classpath for external parser
Merge pull request #579 from emmanuel-keller/1.6

Add external library in debian package
Merge pull request #582 from emmanuel-keller/1.6

Implements #14
Merge pull request #585 from emmanuel-keller/1.6

Working on #14 implementation
Merge pull request #593 from emmanuel-keller/1.6

Implements #589
Fix #605
Libraries update

Conflicts:
	pom.xml
Libraries upgrade