s/複合分/複合文/g
fix sample errors
fix ctor try block description
Merge pull request #126 from tzik/typo_fix

s/複合分/複合文/g
Merge pull request #127 from tzik/desc_fix

fix ctor try block description
Merge pull request #128 from tzik/sample_fix

fix sample errors
wrote a bit more 12.8.
wrote the brief history of dynamic exception specification.
fix #129
Merge branch 'gh-pages' of https://github.com/EzoeRyou/cpp-book into gh-pages