Adding subfolder support (#186)

Adding EJS Templating engine + a baseUrl variable injected in front-end.

front/src/views/about.html

@@ -5,5 +5,5 @@
 
     <p>By the way, <b>it's free</b> because we are geeks, not businessmen. All we want is <a href="https://github.com/gmetais/YellowLabTools" target="_blank" class="star">a <span>&#9733;</span> on GitHub</a>. It will boost our motivation to add more awesome features!!!</p>
 
-    <p><br><a href="/">Back to index</a></p>
+    <p><br><a href="<%= baseUrl %>">Back to index</a></p>
 </div>

front/src/views/dashboard.html

@@ -70,7 +70,7 @@
     <div class="fromShare" ng-if="!error && fromSocialShare">
         <p>Yellow Lab Tools is a free online tool that analyzes performance and front-end quality.</p>
         <a class="linkButton" href="" ng-click="seeFullReport()">See the full report for this page</a>
-        <a class="linkButton" href="/">Test another webpage</a>
+        <a class="linkButton" href="<%= baseUrl %>">Test another webpage</a>
     </div>
 
     <div ng-if="error">

front/src/views/queue.html

@@ -6,7 +6,7 @@
         <p class="statusSubMessage">{{status.error}}</p>
         
         <a class="linkButton" href="https://github.com/gmetais/YellowLabTools/issues" target="_blank">Report the issue on GitHub</a>
-        <a class="linkButton" href="/">New test</a>
+        <a class="linkButton" href="<%= baseUrl %>">New test</a>
     </div>
     <div ng-if="status.statusCode == 'awaiting'">
         <div class="status">
@@ -28,7 +28,7 @@
     <div class="status">Error 404 (test not found)</div>
     <p class="statusSubMessage">The server probably just rebooted. We are very sorry about that, please try to launch the test again.</p>
     
-    <a class="linkButton" href="/">New test</a>
+    <a class="linkButton" href="<%= baseUrl %>">New test</a>
 </div>
 <div ng-if="connectionLost == true">
     <div class="status">Connection lost with server</div>

front/src/views/resultSubHeader.html

@@ -1,7 +1,7 @@
 <div>Tested url: &nbsp; <a href="{{result.params.url}}" target="_blank" class="testedUrl">{{result.params.url}}</a></div>
 
 <div class="resultsMenu">
-    <a class="menuItem back" href="/"><div class="icon-arrow-left3"></div><span>New test<span></a>
+    <a class="menuItem back" href="<%= baseUrl %>"><div class="icon-arrow-left3"></div><span>New test<span></a>
     <a class="menuItem restart" href="" ng-click="testAgain()"><div class="icon-loop"></div><span>Test again<span></a>
     <div class="menuItem" ng-class="{active: Menu.getCurrentPage() == 'dashboard'}" ng-click="Menu.changePage('dashboard')"><div class="icon-list"></div><span>Dashboard</span></div>
     <div class="menuItem" ng-class="{active: Menu.getCurrentPage() == 'timeline'}" ng-click="Menu.changePage('timeline')"><div class="icon-bars"></div><span>JS Timeline</span></div>