Add 'rel='noopener noreferrer' to links generated by linky

Fixes #774

https://medium.com/@jitbit/target-blank-the-most-underestimated-vulnerability-ever-96e328301f4c#.33joaw9fh

index.html

@@ -251,7 +251,7 @@ $ openssl req -nodes -newkey rsa:4096 -keyout relay.pem -x509 -days 365 -out rel
         </div>
 
         <div class="title" title="{{activeBuffer().rtitle}}">
-          <span class="desktop" ng-repeat="part in activeBuffer().title" ng-class="::part.classes" ng-bind-html="::(part.text | linky:'_blank' | DOMfilter:'irclinky')"></span>
+          <span class="desktop" ng-repeat="part in activeBuffer().title" ng-class="::part.classes" ng-bind-html="::(part.text | linky:'_blank':{rel:'noopener noreferrer'} | DOMfilter:'irclinky')"></span>
           <span class="mobile" ng-click="showModal('topicModal')" ng-class="{'active': activeBuffer().active, 'channel': activeBuffer().type === 'channel', 'channel_hash': activeBuffer().prefix === '#', 'channel_plus': activeBuffer().prefix === '+', 'channel_ampersand': activeBuffer().prefix === '&'}">{{ activeBuffer().trimmedName || activeBuffer().fullName }}</span>
         </div>
 
@@ -307,7 +307,7 @@ $ openssl req -nodes -newkey rsa:4096 -keyout relay.pem -x509 -days 365 -out rel
               <td class="prefix"><a ng-click="addMention(bufferline.prefix)"><span class="hidden-bracket">&lt;</span><span ng-repeat="part in ::bufferline.prefix" ng-class="::part.classes" ng-bind="::part.text|prefixlimit:25"></span><span class="hidden-bracket">&gt;</span></a></td><!--
            --><td class="message"><!--
              --><div ng-repeat="metadata in ::bufferline.metadata" plugin data="::metadata"></div><!--
-             --><span ng-repeat="part in ::bufferline.content" class="text" ng-class="::part.classes.concat(['line-' + part.$$hashKey.replace(':','_')])" ng-bind-html="::part.text | linky:'_blank' | DOMfilter:'irclinky' | DOMfilter:'emojify':settings.enableJSEmoji | DOMfilter:'inlinecolour' | DOMfilter:'latexmath':('.line-' + part.$$hashKey.replace(':','_')):settings.enableMathjax"></span>
+             --><span ng-repeat="part in ::bufferline.content" class="text" ng-class="::part.classes.concat(['line-' + part.$$hashKey.replace(':','_')])" ng-bind-html="::part.text | linky:'_blank':{rel:'noopener noreferrer'} | DOMfilter:'irclinky' | DOMfilter:'emojify':settings.enableJSEmoji | DOMfilter:'inlinecolour' | DOMfilter:'latexmath':('.line-' + part.$$hashKey.replace(':','_')):settings.enableMathjax"></span>
               </td>
             </tr>
             <tr class="readmarker" ng-if="activeBuffer().lastSeen==$index">
@@ -492,7 +492,7 @@ $ openssl req -nodes -newkey rsa:4096 -keyout relay.pem -x509 -days 365 -out rel
           <div class="modal-header">
             <button type="button" class="close" ng-click="closeModal($event)" aria-hidden="true">&times;</button>
             <h4 class="modal-title">Channel topic</h4>
-            <p ng-repeat="part in activeBuffer().title" ng-class="::part.classes" ng-bind-html="::(part.text | linky:'_blank' | DOMfilter:'irclinky')"></p>
+            <p ng-repeat="part in activeBuffer().title" ng-class="::part.classes" ng-bind-html="::(part.text | linky:'_blank':{rel:'noopener noreferrer'} | DOMfilter:'irclinky')"></p>
           </div>
           <div class="modal-footer">
             <button type="button" class="btn btn-primary" ng-click="closeModal($event)">Close</button>