第一章部分答案
add answers for 1.6
 fix the format for 1.6
fix the answer for 1.6.3
fix the answer for 1.6.4
fix the format of 1.1.1
fix the format of code
Merge remote-tracking branch 'upstream/master'
fix the format of 1.1.2
Merge pull request #31 from wjk20120522/master

Add partial answers of ch01