Added SCSS stylesheet

Author: auchenberg

jquery.mentionsInput.scss

@@ -0,0 +1,123 @@
+.mentions-input-box {
+  position: relative;
+  background: #fff;
+
+  textarea {
+    width: 100%;
+    display: block;
+    height: 18px;
+    padding: 9px;
+    border: 1px solid #dcdcdc;
+    border-radius: 3px;
+    overflow: hidden;
+    background: transparent;
+    position: relative;
+    outline: 0;
+    resize: none;
+
+    -webkit-box-sizing: border-box;
+    -moz-box-sizing: border-box;
+    box-sizing: border-box;
+  }
+
+  .mentions {
+    position: absolute;
+    left: 1px;
+    right: 0;
+    top: 1px;
+    bottom: 0;
+    padding: 9px;
+    color: #fff;
+    overflow: hidden;
+
+    white-space: pre-wrap;
+    word-wrap: break-word;
+
+    > div {
+      color: #fff;
+      white-space: pre-wrap;
+      width: 100%;
+
+      > strong {
+        font-weight: normal;
+        background: #d8dfea;
+
+        > span {
+          filter: progid:DXImageTransform.Microsoft.Alpha(opacity = 0);
+        }
+      }
+    }
+  }
+
+  .mentions-autocomplete-list {
+    display: none;
+    background: #fff;
+    border: 1px solid #b2b2b2;
+    position: absolute;
+    left: 0;
+    right: 0;
+    z-index: 10000;
+    margin-top: -2px;
+
+    border-radius: 5px;
+    border-top-right-radius: 0;
+    border-top-left-radius: 0;
+
+    -webkit-box-shadow: 0 2px 5px rgba(0, 0, 0, 0.148438);
+    -moz-box-shadow: 0 2px 5px rgba(0, 0, 0, 0.148438);
+    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.148438);
+
+    ul {
+      margin: 0;
+      padding: 0;
+
+      li {
+        background-color: #fff;
+        padding: 0 5px;
+        margin: 0;
+        width: auto;
+        border-bottom: 1px solid #eee;
+        height: 26px;
+        line-height: 26px;
+        overflow: hidden;
+        cursor: pointer;
+        list-style: none;
+        white-space: nowrap;
+
+        &:last-child {
+          border-radius: 5px;
+        }
+
+        &:hover,
+        &.active {
+          background-color: #f2f2f2;
+        }
+
+        > img,
+        > div.icon {
+          width: 16px;
+          height: 16px;
+          float: left;
+          margin-top: 5px;
+          margin-right: 5px;
+          -moz-background-origin: 3px;
+
+          border-radius: 3px;
+        }
+
+        em {
+          font-weight: bold;
+          font-style: none;
+        }
+
+        b {
+          background: #ffff99;
+          font-weight: normal;
+        }
+
+      }
+
+    }
+  }
+
+}