Fixed filename case errors

Jakefile.js

@@ -83,8 +83,8 @@ task('build', {async: true}, function () {
       './src/graph/Groups.js',
       './src/graph/Images.js',
       './src/graph/graphMixins/physics/PhysicsMixin.js',
-      './src/graph/graphMixins/physics/barnesHut.js',
-      './src/graph/graphMixins/physics/repulsion.js',
+      './src/graph/graphMixins/physics/BarnesHut.js',
+      './src/graph/graphMixins/physics/Repulsion.js',
       './src/graph/graphMixins/ManipulationMixin.js',
       './src/graph/graphMixins/SectorsMixin.js',
       './src/graph/graphMixins/ClusterMixin.js',

examples/graph/20_navigation.html

@@ -130,10 +130,10 @@
   <table class="legend_table">
     <tr>
       <td>Icons: </td>
-      <td><div class="table_content"><img src="../../dist/img/uparrow.png" />     </div></td>
-      <td><div class="table_content"><img src="../../dist/img/downarrow.png" />   </div></td>
-      <td><div class="table_content"><img src="../../dist/img/leftarrow.png" />   </div></td>
-      <td><div class="table_content"><img src="../../dist/img/rightarrow.png" />  </div></td>
+      <td><div class="table_content"><img src="../../dist/img/upArrow.png" />     </div></td>
+      <td><div class="table_content"><img src="../../dist/img/downArrow.png" />   </div></td>
+      <td><div class="table_content"><img src="../../dist/img/leftArrow.png" />   </div></td>
+      <td><div class="table_content"><img src="../../dist/img/rightArrow.png" />  </div></td>
       <td><div class="table_content"><img src="../../dist/img/plus.png" />        </div></td>
       <td><div class="table_content"><img src="../../dist/img/minus.png" />       </div></td>
       <td><div class="table_content"><img src="../../dist/img/zoomExtends.png" /> </div></td>