add metadata to styleProperty, pass metadata per page to header/footer

metadata does not have an effect on styling. It was a quick hack to
retain this information on `item` so that we can pass it on to
header/footer

Author: robstoll

.gitignore

@@ -2,6 +2,7 @@ npm-debug.log
 node_modules
 doc
 .DS_Store
+.history
 .idea
 *.iml
 *.ipr