Revert "Some not working stuff..."

This reverts commit bf77147cac10fcca92f35d05a2913bd1874181d0.
Revert "Added data types for constant pool"

This reverts commit 01af6b40b4a0aa6b870c76f17ae5288153fe5057.
Revert "A whole lot to do with attributes."

This reverts commit 34218c6fa03d6faf8a0e25f449df683f28169575.
Revert "Added read/write methods to Attr interface. Implemented read/write for first few types."

This reverts commit fd8afc1b7cc700fccae45c60eb7569ad93b67fd8.
Revert "Added code Attribute"

This reverts commit 0422ac24b2918c0cf6a0505bed683e0000ee663c.
Revert "Started adding individual attributes"

This reverts commit 26e3b1dd007645998c69da76c816f693de08168b.