https://github.com/tc-frontend/course_angular2_day1_snapshot1
https://github.com/tc-frontend/course_angular2_day1_snapshot2
https://github.com/tc-frontend/course_angular2_day1_snapshot3
https://github.com/tc-frontend/course_angular2_day1_snapshot4
https://github.com/tc-frontend/course_angular2_day1_snapshot5
https://github.com/tc-frontend/course_angular2_day1_snapshot6
https://github.com/tc-frontend/course_angular2_day1_snapshot7
https://github.com/tc-frontend/course_angular2_day1_snapshot8
https://github.com/tc-frontend/course_angular2_day2_snapshot1
https://github.com/tc-frontend/course_angular2_day2_snapshot2
https://github.com/tc-frontend/course_angular2_day2_snapshot3
https://github.com/tc-frontend/course_angular2_day2_snapshot4
https://github.com/tc-frontend/course_angular2_day2_snapshot5