wrap long paragraphs
cite "What is interaction?" by Debby and Sigbert
should not be a new paragraph
mention the original author of MVC; I cannot answer the next question of you, Heike; the best we can do is to email a couple of software package authors and ask them what design patterns they used, otherwise I guess it will be very challenging for us to figure out the answer by ourselves
Revert "small edits"

This reverts commit b7abde7a67e3506ba3d28360114434c01ad93220.

the typo neigbor was also fixed