Tweak tag display, add alt secondary syntax

css/ebi-global-includes/_tag.scss

@@ -37,6 +37,7 @@ $tag-radius: $global-radius !default;
 @mixin ebi-tag {
   a.tag {
     color: $tag-color;
+    border-bottom-style: none;
   }
   .tag {
     @include tag;

css/ebi-global.css

@@ -114,6 +114,7 @@ div.warning {
 .white-background, a.white-background, .tag.white-background, .button.white-background {
   background: white; }
 
+.tag.secondary,
 .secondary-background, a.secondary-background, .tag.secondary-background, .button.secondary-background {
   background: #666; }
 
@@ -1116,7 +1117,8 @@ table.no-stripe tbody tr:nth-child(even) {
 
 /* tag */
 a.tag {
-  color: white; }
+  color: white;
+  border-bottom-style: none; }
 
 .tag {
   display: inline-block;

css/ebi-global.scss

@@ -88,6 +88,7 @@ a:active {
 .industry-background, a.industry-background, .tag.industry-background, .button.industry-background  { background: $ebi-colour-industry; }
 .elixir-background, a.elixir-background, .tag.elixir-background, .button.elixir-background    { background: $ebi-colour-elixir; }
 .white-background, a.white-background, .tag.white-background, .button.white-background     { background: $ebi-colour-white; }
+.tag.secondary, 
 .secondary-background, a.secondary-background, .tag.secondary-background, .button.secondary-background { background: $ebi-colour-dark-grey; }
 
 .ebi-color, .ebi-color cite, .ebi-color a, .ebi-color a:visited, .ebi-color h3, .ebi-color h4, .label.ebi-color, a.ebi-color, a:hover.ebi-color { color: $ebi-colour-petrol; }