Add Chapter 5 notes fix final version of ELIZA

Signed-off-by: Zlatozar Zhelyazkov <zlatozar@gmail.com>
Initial commit for Chapter 6

Signed-off-by: Zlatozar Zhelyazkov <zlatozar@gmail.com>
Format examples output

Signed-off-by: Zlatozar Zhelyazkov <zlatozar@gmail.com>