revise index.md
revise detector.md
test anchor
test anchor
test anchor
Merge https://github.com/Andrwyw/android-training-course-in-chinese into Andrwyw-gh-pages

Conflicts:
	SOURCE/input/gestures/detector.md
	SOURCE/input/gestures/index.md
Merge branch 'Andrwyw-gh-pages' into gh-pages