added regression test for "jmp 0x33, 08"

Add 13 roundtrip failures.

python 2/3 compatibility in KsError.__str__ and Ks.asm

Regress test for SHR/SHL/SAR/SAL

This test needs to be checked for correctness.

Add two round-trip failures.

Add crash case: crash-38-x64-cast-ty-argument-of-incompatible-type.c

Add six round-trip failures

```
$ ./crash-38-x64-cast-ty-argument-of-incompatible-type
/path/to/llvm/include/llvm/Support/Casting.h:230: typename llvm::cast_retty<To, From>::ret_type llvm::cast(Y&) [with X = llvm::MCSectionELF; Y = llvm::MCSection; typename llvm::cast_retty<To, From>::ret_type = llvm::MCSectionELF&]: Assertion `isa<X>(Val) && "cast<Ty>() argument of incompatible type!"' failed.
Aborted
```

Add six round-trip failures.

fix Go bindings for 32-bit

Add a few round-trip failures.

fix go bindings with system-installed keystone

Add eleven round-trip failures.

Minor updates

 Removed unused utility functions and renamed variables

Add two crash cases