Chapter 5 Ex. 11 TODO executed

The AffixTagger accuracy has been added
Chapter 7 Ex.3 Corrected

I added the evaluation of my chunker
Revert "Chapter 7 Ex.3 Corrected"

This reverts commit f8a9ed32258639f5000df4fc9a1d17bb8e25f397.
Revert "Chapter 5 Ex. 11 TODO executed"

This reverts commit 13cd95ec25f532c23daccf8369a6f072f8f7ac04.
Chapter 7 Ex.3

I added the evaluation of my chunker