Merge remote-tracking branch 'upstream/master'

slides/l02/img/android-logo.png

slides/l02/img/animation/android-animate.gif

slides/l02/img/animation/animation-linear.png

slides/l02/img/animation/valueanimator.png

slides/l02/img/animationDemo.mov

slides/l02/img/animationPractice.zip

slides/l02/img/anydo-example.png

slides/l02/img/first-android-project-structure.png

slides/l02/img/instagram-example.png

slides/l02/img/wizard.png

slides/l03/img/LayoutSpec.png

slides/l03/img/android-linear.png

slides/l03/img/constraint-editor.png

slides/l03/img/design-view.png

slides/l03/img/exam-q-sol.png

slides/l03/img/interactor-hierarchy.png

slides/l03/img/pinterest-android.png

slides/l03/img/watch3.png

slides/l03/img/xmlvsjava.png

slides/l03/layout.html