Removed the bugfix version number and changed the default values for versions (for now)

I removed the bugfix version because it doesn't belong in the format.
I have now expanded the development version to two bytes. This will allow more development flags.
I have changed the default values for version because the format is still in development. Once the format has been developed, I will change the values.
Cleaned up the checkIsObjectPackHeader test by changeing REQIURE's to CHECK's and changing the description.
Added function to check the version of the ObjectPack file.

Currently, this function makes sure that the major version matches and the file minor version is lesser or equal than the library minor version.
I also check to see if the development version is 0xFFFF.