Bumping master to 4.0.0-SNAPSHOT
Added missing source headers.
API for 3.9.0
Updating manual.
Merge branch 'bugfix/3.9.x'

Conflicts:
	carrot2.version
Update to RR 2.1.0
Update to official 2.1.0
Update attribute binder to 1.2.1 (minor NPE bugfix).
Update attribute binder to 1.2.2
Mergeback of changes on 3.9.x
Merge branch 'bugfix/3.9.x'
Ignore .settings/ (Eclipse).
CARROT-1061: Impoved verbose logging (-v option) in DCS
Merge branch 'master' into bugfix/3.9.x