Added required_flags() to Code. Also added some bitwise operations to
FlagSet to make this easier.
Fix bug in FlagSet::swap
Merge branch 'issue-99' into develop. Fixes #99.
Ignore autogen files in git
Merge branch 'issue-100' into develop. Fixes #100.
Fix FlagSet::write_text.
Fix FlagSet::write_text.
Merge branch 'issue-98' into develop. Fixes #98.
Fix old bug on how to compute must_write sets
gitignore
Merge branch 'issue-102' into develop. Fixes #102.
is_unaligned() and supporting methods.
Merge branch 'issue-104' into develop
Special handling of xor %eax %eax and similar to not read any registers
Merge branch 'issue-103' into develop.  Fixes #103.
Also handle xor rh rh
Merge branch 'issue-103' into develop
is_popcnt() and fixed is_pop() is_push()
Merge branch 'issue-108' into develop
Implement iterator, printing and parsing support for mm registers