Merge pull request #21 from RosesJack/master

Update XHeaderView.java

Merge pull request #10 from 0kai/master

Update XListView.java

Fix the issue when pulling down it don't scroll back to the top.

Update readme.

Update readme.

Add auto refresh and scroll bottom to auto load more feature for XScrollView.

Add auto refresh and scroll bottom to auto load more feature for XListView.

Update gradle plugin version to 0.10.

Optimize code and update gradle plugin' version to 0.10.

Update Gradle plugin' version.

Modify import class.

Modify open source license.

Update Gradle plugin' version.