fixes 32-bit, makes odd behavior on 64-bit (GDB 7.6)
beefed up test script, addresses issue #6 for x86 (but not arm yet)
fixed integer conversion bug even more! it seems when comparing a Python int with a Gdb.Value, GDB's python converts the python int down to a Gdb.Value, which can cause an overflow exception; this new fix attempts to make everything unsigned using that one weird 0xFF...F python tactic
Merge pull request #14 from jfoote/int_conv_bug

Int conv bug (issue #14) and issue #6 fixed for x86 only