Initial commit
A: JavaScript files
U: Self-definition tooltip method.
A: core file of Hanger
U: update README.md
U: update README.md
A: return to top
U: CIMU_UI.js
U: CIMU_UI.js
A: Sass files
U: Sass files
U: Sass files
U: script files
U: move JavaScript files into folder script
U: rename folders
A: Page's footer sink to the bottom.
U: Rename folders, and add jQuery.
U: rename folders
U: use strict mode
A: test cases