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
* added a test file to suite for testing invalid and valid instruction sequences

* fixed and added a test for a thumb-2 invalid sequence that was incorrectly allowed before these changes (pop.w with sp argument included)
* fixed and added a test for a blx from thumb to ARM that had its immediate argument incorrect (misaligned)

* eliminated some warnings by explicitly casting so I could turn on
  treat warnings as errors locally

General notes:
*  probably worth turning on treat all warnings as errors in the msvc project files, had a subtle bug that resulted from a missing declaration causing differences in dll and static compilation modes

( code was working incorrectly in dll form because of missing declaration in arch/ARM/ARMMapping.h for new function ARM_blx_to_arm_mode. Something about the linking was confusing ld when making the dll, and the resulting offsets were wonky (e.g. the added ble test would show up as #0x1fc instead of #0x1fe like it should have )

* the invalid pop was being treated as a soft fail which then gets coerced
  to a success because it is != MCDisassembler_Fail in Thumb_getInstruction
  what are the semantics of a soft fail? Maybe we should be able to set up
  whether or not we want a soft fail to be a real fail in the csh struct?
on OSX, 'make uninstall' should clean files under /usr/local rather than /usr
Merge branch 'next' of https://github.com/flyingsymbols/capstone into arm
fix indentation introduced by the latest merge. also move test_arm_regression.c into suite/arm/ and add Makefile for it
arm: some simple improvements & cleanups