use relative URLs for assets

this makes it possible to serve hound off of a different location than
"/".

fixes hound-search#188
closes hound-search#229

Author: Daniel Schauenberg

ui/assets/js/excluded_files.js

@@ -78,7 +78,7 @@ var FilterableExcludedFiles = React.createClass({
   getInitialState: function() {
     var _this = this;
     $.ajax({
-      url: '/api/v1/repos',
+      url: 'api/v1/repos',
       dataType: 'json',
       success: function(data) {
         _this.setState({ repos: data });
@@ -103,7 +103,7 @@ var FilterableExcludedFiles = React.createClass({
       repo: this.state.repos[repo],
     });
     $.ajax({
-      url: '/api/v1/excludes',
+      url: 'api/v1/excludes',
       data: {repo: repo},
       type: 'GET',
       dataType: 'json',

ui/assets/js/hound.js

@@ -139,7 +139,7 @@ var Model = {
     }
 
     $.ajax({
-      url: '/api/v1/repos',
+      url: 'api/v1/repos',
       dataType: 'json',
       success: function(data) {
         _this.repos = data;
@@ -181,7 +181,7 @@ var Model = {
     }
 
     $.ajax({
-      url: '/api/v1/search',
+      url: 'api/v1/search',
       data: params,
       type: 'GET',
       dataType: 'json',
@@ -249,7 +249,7 @@ var Model = {
     });
 
     $.ajax({
-      url: '/api/v1/search',
+      url: 'api/v1/search',
       data: params,
       type: 'GET',
       dataType: 'json',
@@ -453,7 +453,7 @@ var SearchBar = React.createClass({
       statsView = (
         <div className="stats">
           <div className="stats-left">
-            <a href="/excluded_files.html"
+            <a href="excluded_files.html"
               className="link-gray">
                 Excluded Files
             </a>