only verify x86_prefix[0] for x86 arch. bug reported by @pancake
simplify code copying @mnemonic in fill_insn()
Fix universal build support for Mac and iOS
Simplify universal builds by relying on the linker to do the right thing
Fix minor style inconsistency
Remove accidentally left-over V=1 in the iOS build step
Set `LIBARCHS` to `i386 x86_64` when building on OS X

Use the Makefile directly to override.
OSX: install into /usr/local rather than /usr
systemz: initialize detail->sysz in SystemZ_getInstruction. bug reported by Ben Nagy
sparc: initialize detail->sparc in Sparc_getInstruction. bug reported by Ben Nagy
Change the prototype of the callback in SKIPDATA option. Suggested by Ben Nagy.

Original prototype:
  typedef size_t (*cs_skipdata_cb_t)(const uint8_t *code, uint64_t offset, void* user_data);

Now we add @code_size argument to reflect the size of the input buffer @code.
Also, we change the data type of @offset to size_t because this argument indicates the
distance from currently examining bytes to @code, but not the address of the byte.

  typedef size_t (*cs_skipdata_cb_t)(const uint8_t *code, size_t code_size, size_t offset, void* user_data);
python: fix test_skipdata.py after the change in the core on SKIPDATA's callback prototype
update docs/README for some sample kernel applications
x86.operands array wasn't fully cleared