Add missing less files

public/ng/less/gogs/sign.less

@@ -0,0 +1,63 @@
+@import "../ui/var";
+
+/*
+The register and sign-in page style
+*/
+
+@signPanelBgColor: #FFF;
+
+#sign-wrapper {
+  padding: 60px 0;
+}
+
+.sign-panel {
+  background-color: @signPanelBgColor;
+}
+
+.sign-form.form-align {
+  .field {
+    margin: 1.2em 0 2em 0;
+  }
+  .ipt-large {
+    width: 300px;
+  }
+  label,
+  .form-label {
+    width: 160px;
+  }
+  .alert{
+    margin:0 30px 24px 30px;
+  }
+  &:hover{
+    box-shadow: 0 0 6px #CCC;
+  }
+}
+
+.sign-form.container{
+  padding: 0;
+  width: 600px;
+  margin-bottom: 80px;
+}
+
+// register form element
+#sign-up-form {
+  .panel-content{
+    margin-top: 1.2em;
+  }
+  h2 {
+    margin: .5em 1em;
+  }
+}
+
+#sign-social{
+  position: relative;
+  margin: 40px 0;
+  .or{
+    position: absolute;
+    width: 30px;
+    top: -52px;
+    left: 50%;
+    background-color: #FFF;
+    margin-left: -15px;
+  }
+}