chap1-2.1
chap1-2.2
chap1-2.3
Added gitignore
chap1-3.1
chap1-4.1
chap1-4.2
Modified gitignore
Git experiments
chap1-4.3
chap1-4.4
chap1-5.1
chap2-6.1
chap2-7.1
chap2-9.1
chap2-9.2
chap2-10.1
chap2-11.1
chap2-12.1
chap2-12.2