initialize variables correctly in ks_struct. closes #250

arm_bl_label_test_case

added documentation for using keystone as a library in cross compiled…

added regression test for sym_resolver

update bindings to add KS_OPT_SYM_RESOLVER. Python binding now supports this option. see sample.py for example

[haskell bindings] Updated transformers dependency to work with GHC 8

Update OCaml bindings with RADIX16 option

go: Update to latest keystone package API & Remove unnecessary else

- 'beta' and renaming is unnecessary

Signed-off-by: Koichi Shiraishi <zchee.io@gmail.com>

- Currently can't building because not found const variables

- panic built-in function is always exist of program. Remove else and
  export 'ks' variable in the main function

Signed-off-by: Koichi Shiraishi <zchee.io@gmail.com>

fix memory leaks in ks_asm().

use KS_ERR_NOMEM instead of -1.