Finish implementing complete class file spec

[Col-E]

Currently, many attributes use a raw byte[] dummy implementation, which works for IO purposes... but this does not allow users to explore the class using Cafedude's defined types and restricts the ability to parse things in detail.

[JCWasmx86]

Hey, I would like to help you and implement some/all attributes.

[Col-E]

That'd be great!

I don't have a real contribution guide set up, but in general the process is:

1. Pick an attribute from the switch in ClassFileReader
2. Find the relevant section on the class file spec page and check what order of u1, u2, u4 etc (Example: LineNumberTable)
3. Create the class in me/coley/cafedude/attribute
4. Fill out the switch-case in the reader class to construct a new instance of the attribute class
5. Fill out the switch-case in the writer class to write back an instance of the attribute to the output stream
6. Verify that the test class EqualityIOTest passes, which means the read/writes are identical

I was working a bit on the develop branch for annotation processing. It includes some refactoring so you may want to branch off of it instead of master.