Change output of Property.parse()

This now returns a Property with a Name of None
- This kind of property will not export the "None" { } block surrounding
the values
- This way, parse() gives an object that supports find_all and
find_keys()
- Find_all and find_keys() now only work on Property objects
- Most of the app has been modified to account for these changes
- In packageLoader, we gradually determine the number of resources in
the zip files, instead of all-at-once after the packages have all loaded
- Update package zips