Merge pull request #1 from Mooophy/master

Update README
added ex1.x
rename
added some links
add ex1.3-1.6
Update index.md
added ex1.7_1.8
added ex1.9~1.11
Update index.md
added ex1.12~1.15
added 1.16~1.19
Update ex1.17_1.19.md
added ex1.20~1.22
Merge branch 'master' of github.com:pezy/Cpp-Primer
Update index.md
Update ex1.20_1.22.md
finish the first chapter
Merge pull request #3 from pezy/master

Finish the chapter 1. Getting Started.
Thx for pezy's contribution.