fix: widgets.searchbox => widgets.searchBox

Widgets names should be camel case to avoid future issues like
widgets.wowwidget

Author: vvo

example/app.js

@@ -9,7 +9,7 @@ var instant = new instantsearch.InstantSearch(
 );
 
 instant.addWidget(
-  instantsearch.widgets.searchbox({
+  instantsearch.widgets.searchBox({
     container: '#search-box',
     placeholder: 'Search for products',
     addClass: 'form-control'

index.js

@@ -3,7 +3,6 @@
 module.exports = {
   InstantSearch: require('./lib/InstantSearch'),
   widgets: {
-    searchbox: require('./widgets/searchbox'),
-    results: require('./widgets/hits')
+    searchBox: require('./widgets/search-box/'),
   }
 };

widgets/searchbox/index.js renamed to widgets/search-box/index.js

@@ -16,7 +16,7 @@ function searchbox(params) {
           setQuery={bind(helper.setQuery, helper)}
           search={bind(helper.search, helper)}
           placeholder={params.placeholder}
-          inputClass={params.addClass} />, container
+          inputClass={params.cssClass} />, container
       );
     }
   };