Add file deletion functionality

Adds route for file deletion
Add styles and images for this

lib/gollum/app.rb

@@ -221,6 +221,19 @@ module Precious
       end
     end
 
+    post '/deleteFile/*' do
+      forbid unless @allow_editing
+      wiki = wiki_new
+      filepath = params[:splat].first
+      unless filepath.nil?
+        commit           = commit_message
+        commit[:message] = "Deleted #{filepath}"
+        wiki.delete_file(filepath, commit)
+      end
+
+      redirect to('/fileview')
+    end
+
     post '/rename/*' do
       wikip = wiki_page(params[:splat].first)
       halt 500 if wikip.nil?

lib/gollum/public/gollum/css/_styles.css

@@ -85,6 +85,22 @@ ol.tree
         margin-right: 7px;
         vertical-align: text-top;
       }
+      li.file form
+      {
+          vertical-align:middle;
+          display: inline-block;
+      }
+        li.file form button
+        {
+          vertical-align:middle;
+          height: 20px;
+          padding-left: 36px;
+          padding-right: 10px;
+          border: 0px solid #000000;
+          background: url("../images/fileview/trashcan.png") no-repeat 16px center;
+          cursor: pointer;
+        }
+      }
       li.file a[href *= '.pdf'] span.icon { background: url(../images/fileview/document.png) 0 0 no-repeat; }
       li.file a[href *= '.html'] span.icon { background: url(../images/fileview/document.png) 0 0 no-repeat; }
       li.file a[href $= '.css'] span.icon { background: url(../images/fileview/document.png) 0 0 no-repeat; }
@@ -125,4 +141,3 @@ ol.tree
   }
     li input:checked + ol > li { display: block; margin: 0 0 0.125em;  /* 2px */}
     li input:checked + ol > li:last-child { margin: 0 0 0.063em; /* 1px */ }
-