fix CanMinimize

Currently, there are only a few basic features, and more features will be added in version 2.0

when we set CanMinimize, Maximize must be collapsed

add showRowNumber property to DataGrid

add RichTextBox to en language, @ghost1372 tnx

now you can clear and verify the text of textbox

now you can clear, verify the value of NumericUpDown

thanks to @ghost1372 suggestion

Togglebutton has a blue border by default, fixed now

According to @ghost1372 suggestion, growl has been improved.

1. add window demo
2. add scrollviewer demo
3. add radiobutton style
4. fixed some bugs
5. add r...

2. simplify the logic of close callback of growl
3. Make sure that the path is displayed properly...

1. add datagrid style
2. improve the numericupdown
3. add checkbox style
4. add listbox demo
5. ...

@ghost1372 thanks

TimeBar, Steps, PopupWindow, Growl, Carousel

This reverts commit 16c42acdf1035a315ce6ff34ecc251a7a1222f9c.

This reverts commit e7e3f3610c934e34ebdd81903509222b7eeb5752.

2. Some styles have been modified, including button, menu and popupwindow

Add a Gitter chat badge to README.md

1. add IsEnableInertia Property;
2. add IsPenetrating Property;

these brief info are used in readme.md

add icon file

modify img info