Fixed [I, you] goes into "I and you", still need to work on it to get "me and you"
Prepositions should now be working.

This commit goes together with the patch to icon_meanings.data available at

http://pastebin.com/ZtFuZ4Sr

The modifications to matchNounPhrase are necessary to generate things like
"with you" properly.
Merge pull request #25 from DrDub/master

merged with DrDub: Prepositions should now be working