Added special class for rounded button in IE8
.button query -> Quering by selectors instead of plain class name
Statically added .buttonIE8 class to button
Removed position: relative from .buttonIE8 class
Removed changes related to rounded buttons support in early IE
Removed rounded corner images
Added css3pie to the project
adjusted css3pie path
Added pie-background for ie6-8
Button -> Change background-gradient for ie6-8 to pie-background
Added containers for each button