Having the trailing / in the directory treeview is cruft

I wanted to remove the trailing / in the tree view. However, I have no
idea if this breaks other stuff?
@nathansobo @probablycorey

src/app/directory.coffee

@@ -10,7 +10,7 @@ class Directory
   constructor: (@path) ->
 
   getBaseName: ->
-    fs.base(@path) + '/'
+    fs.base(@path)
 
   getPath: -> @path