STANBOL-1252: Added support for MIN_FOUND_TOKEN allowing to configure a static lower limit of the number of Tokens that need to match within a processable chunk (typically Noun phrases); Minor: changed the order of the chained TagCloudReducer so that the LinkableTokenFilter needs to process less potential tags.

git-svn-id: https://svn.apache.org/repos/asf/stanbol/trunk@1557037 13f79535-47bb-0310-9956-ffa450edef68