added compass, added some basic stylesheets

source/stylesheets/library/_button_style.sass

@@ -0,0 +1,45 @@
+=btn-border-color(!color)
+  border-color= darken(!color, 25)
+
+=btn-text-shadow(!color)
+  !text_shadow = darken(!color, 25)
+  text-shadow= !text_shadow  "1px 1px 1px"
+
+=btn-style(!color)
+  !color1 = lighten(!color, 30)
+  !color2 = darken(!color, 20)
+  +h-linear-gradient(!color1, !color2)
+  background-color= !color
+  +btn-border-color(!color)
+  +btn-text-shadow(!color)
+
+=btn-style-hover(!color)
+  !color = lighten(!color, 8)
+  !color1 = lighten(!color, 22)
+  !color2 = darken(!color, 38)
+  +h-linear-gradient(!color1, !color2)
+  background-color= !color
+  +btn-border-color(!color)
+  +btn-text-shadow(!color)
+
+=btn-style-active(!color)
+  !color = darken(!color, 5)
+  !color1 = lighten(!color, 25)
+  !color2 = darken(!color, 35)
+  +h-linear-gradient(!color1, !color2)
+  background-color= !color
+  +btn-border-color(!color)
+  +btn-text-shadow(!color)
+
+=btn-structure(!font_size, !border_width, !line_height = !font_size *1.2)
+  !v_padding = floor(!font_size/2.5)
+  !h_padding = floor(!font_size)
+  !v_padding_active = !v_padding - 1px
+  !h_padding_active = !h_padding - 1px
+  border-width= !border_width
+  font-size= !font_size
+  padding= !v_padding !h_padding
+  line-height= !line_height
+  &:active
+    border-width= !border_width + 1px
+    padding= !v_padding_active !h_padding_active