Added the project's files to the repo

assets/sass/mixins/_-all.sass

@@ -0,0 +1,4 @@
+@import 'background-size'
+@import 'filter'
+@import 'no-select'
+@import 'text-border'

assets/sass/mixins/_background-size.sass

@@ -0,0 +1,5 @@
+@mixin background-size($size)
+	-webkit-background-size: $size
+	-moz-background-size: $size
+	-o-background-size: $size
+	background-size: $size

assets/sass/mixins/_filter.sass

@@ -0,0 +1,6 @@
+@mixin filter($filter)
+	-webkit-filter: $filter
+	-moz-filter: $filter
+	-o-filter: $filter
+	-ms-filter: $filter
+	filter: $filter

assets/sass/mixins/_no-select.sass

@@ -0,0 +1,7 @@
+@mixin no-select ()
+    -webkit-touch-callout: none
+    -webkit-user-select: none
+    -khtml-user-select: none
+    -moz-user-select: none
+    -ms-user-select: none
+    user-select: none

assets/sass/mixins/_text-border.sass

@@ -0,0 +1,2 @@
+@mixin text-border($thickness, $color)
+	text-shadow: 0px -#{$thickness} $color, -#{$thickness} 0 $color, 0 $thickness $color, $thickness 0 $color