lecture 6

a subclass of ViewController
Lecture 6 another example

organize the file. adding a new example.
Lecture 6 simple demo

uiNavigation
Lecture 6 viewController

Finish
Merge branch 'Dev'
Lecture 7 over

gesture
Merge branch 'Dev'
Lecture 7 add pics

add pics
Lecture 8 with some bug
Lecture 9 more in Drop it

the bug still not fix. Adding line view.
Lecture 9 autolayout Demo
Lecture 9 attribute autolayout
Merge branch 'Dev'
Lecture 10 new app init

pic
Lecture 10 Scroll View
Merge branch 'Dev'