Merge pull request #2 from yunxiyinzhe/develop

Develop
Merge pull request #3 from yunxiyinzhe/develop

add notes fragment and dictionary fragment
Update README.md
Merge pull request #4 from yunxiyinzhe/develop

Update README.md
Merge pull request #5 from yunxiyinzhe/merge

先塞进去，慢慢修改
Merge pull request #6 from yunxiyinzhe/develop

Develop
Update README.md
Merge pull request #7 from yunxiyinzhe/develop

Develop
code refine
adjust the location of the popup window
simple add notes