JSR Operation Implemented
Fixed JSR

Fixed the JSR Operation, it was implemented incorrectly, and the address
is off by one.
RTS Operation Implemented
BRK Operation Implemented
RTI Instruction Finished

Finished the last opcode
Removed unused Flag

Flag was not needed at this time
Documentation Cleanup, Bug Fixes

Cleaned up the Documentation,
Fixed the JMP Indirect Operation
Fixed the AddressingMode enums values.