Fleshed out a lot of the parser, and now it pretty much reads a large number
of the udiprops format.

* Fleshed out the main parser functions.
* Fleshed out the parseLine function, and now it handles a few of the udiprops
  statements.
* Fixed some errors in the structs for the index; for example, release should
  be an index and a string, and not just an integer.
* Readable files now have their own index.
* Added the command-line option --printsizes.