Add filter option#1

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DerGuteMoritz wants to merge 4 commits intodjpowell:masterfrom

DerGuteMoritz:filtering

Commits on Jan 30, 2013

Add filter option
Moritz Heidkamp
committed
Update README
Moritz Heidkamp
committed
Some formatting fixes
Moritz Heidkamp
committed
Slightly more realistic :filter example
Moritz Heidkamp
committed