15 : For 번역완료

15: For 완료하였습니다.
Merge pull request #1 from pcjpcj2/patch-1

15 : For 번역완료
function parts translated.
web server translated
fixed backtick error
Merge branch 'master' of https://github.com/golanger/go-tour-translator
Merge branch 'master' of https://github.com/golanger/go-tour-translator
Merge branch 'master' of https://github.com/golanger/go-tour-translator
Translated chapter 48, 48 and 50

* 48. Methods and Interfaces
* 49. Methods
* 50. Method continued
Translated chapter 51

* 51. Methods with pointer receivers
Merge pull request #42 from suapapa/master

48, 49, 50, 51장 번역 완료
Merge branch 'master' of https://github.com/golanger/go-tour-translator
fixed typing error
Translated chapter 52

* 52. Interfaces
tr_stat.py: Oops, fix wrong calcuration
Translated chapter 53

* 53. Interfaces are satisfied implicitly
Translated chapter 54

* 54. Errors
Merge pull request #45 from sjp38/master

Translation for chapter 38 ~ 42
Merge pull request #46 from suapapa/master

52, 53, 54 번역완료
add and translated chapter 3