Bug Fixes and Copyright Date Change

The simulator now passes Klaus Dormann's 6502 Functional Test suite for
the first time.

Bug Fixes:

- PHP was not correctly setting the Break bit on the stack copy of the
  processor status, so subsequent PLA's would not set the Break status
  flag.

- The CPU had swapped NMI and IRQ reset vectors, so RTI was failing.

- BRK was pushing PC + 2 onto the stack, instead of PC + 1

- (Zero Page,X) addressing mode did not correctly wrap on zero page
  boundaries.

- The instruction table used for disassembly had addressing modes
  of LDA $B9 and $BD reversed. This did not affect behavior, only
  disassembly of these instructions.

Other:

- Updated copyright date for 2013.

- Started migrating old JUnit 3 style tests to JUnit 4 annotations.

src/main/java/com/loomcom/symon/InstructionTable.java

@@ -241,8 +241,8 @@ public interface InstructionTable {
         Mode.ABS, Mode.ABS, Mode.ABS, Mode.NUL,   // 0xac-0xaf
         Mode.REL, Mode.INY, Mode.NUL, Mode.NUL,   // 0xb0-0xb3
         Mode.ZPX, Mode.ZPX, Mode.ZPY, Mode.NUL,   // 0xb4-0xb7
-        Mode.IMP, Mode.ABX, Mode.IMP, Mode.NUL,   // 0xb8-0xbb
-        Mode.ABX, Mode.ABY, Mode.ABY, Mode.NUL,   // 0xbc-0xbf
+        Mode.IMP, Mode.ABY, Mode.IMP, Mode.NUL,   // 0xb8-0xbb
+        Mode.ABX, Mode.ABX, Mode.ABY, Mode.NUL,   // 0xbc-0xbf
         Mode.IMM, Mode.XIN, Mode.NUL, Mode.NUL,   // 0xc0-0xc3
         Mode.ZPG, Mode.ZPG, Mode.ZPG, Mode.NUL,   // 0xc4-0xc7
         Mode.IMP, Mode.IMM, Mode.IMP, Mode.NUL,   // 0xc8-0xcb