Skip extra files and folders in copy phase of generation

Author: Aaron O'Mullan

lib/generate/fs.js

@@ -16,9 +16,20 @@ var getFiles = function(path) {
 
     // Add extra rules to ignore common folders
     ig.addIgnoreRules([
+        // Skip Git stuff
         '.git/',
         '.gitignore',
-        '.DS_Store'
+
+        // Skip OS X meta data
+        '.DS_Store',
+
+        // Skip stuff installed by plugins
+        'node_modules',
+
+        // Skip book outputs
+        '*.pdf',
+        '*.epub',
+        '*.mobi',
     ], '__custom_stuff');
 
     // Push each file to our list