Change date in Knappe measure

[sharispe]

Thanks to Alex Henrie.

The following citation is given under both direct groupwise measures and a set-based measures:

Knappe R, Bulskov H, Andreasen T: Perspectives on ontology-based querying. International Journal of Intelligent Systems 2004, 22:739-761.

I searched for this paper, but it looks like it was published in 2007, not 2004: http://onlinelibrary.wiley.com/doi/10.1002/int.20226/abstract

Unless I am mistaken, the citation should be corrected, and the flag should be renamed to SIM_FRAMEWORK_DAG_SET_KNAPPE_2007.

TODO

• Change associated labels in the library and the toolkit
• update the documentation