Don't fail if page doesn't exist

lib/output/__tests__/website.js

@@ -26,6 +26,21 @@ describe('WebsiteGenerator', function() {
         });
     });
 
+    pit('should not generate file if entry file doesn\'t exist', function() {
+        return generateMock(WebsiteGenerator, {
+            'README.md': 'Hello World',
+            'SUMMARY.md': '# Summary\n\n* [Page 1](page.md)\n* [Page 2](test/page.md)',
+            'test': {
+                'page.md': 'Hello 2'
+            }
+        })
+        .then(function(folder) {
+            expect(folder).toHaveFile('index.html');
+            expect(folder).not.toHaveFile('page.html');
+            expect(folder).toHaveFile('test/page.html');
+        });
+    });
+
     pit('should generate a multilingual book', function() {
         return generateMock(WebsiteGenerator, {
             'LANGS.md': '# Languages\n\n* [en](en)\n* [fr](fr)',

lib/parse/parsePagesList.js

@@ -28,6 +28,8 @@ function parsePagesList(book) {
                 filepath,
                 Page.createForFile(file)
             );
+        }, function() {
+            // file doesn't exist
         });
     })
     .then(function() {