Fixed MRB_INT64 warning
Fixed mistake
defined printf macro for mrb_int
Initialize Range->edges after cheking `beg` and `end` to prevent segmentation fault.
Enable test for `Range#initialize`.
Added .lib extension for library file on VS2012
Change the way that the DISABLE_GEMS flag is set.
Remove API mrb_str_catf().
Remove unused function parametes.
Merge pull request #792 from monaka/pr-remove-mrb_str_vcatf

Remove API mrb_str_catf().
Merge pull request #794 from monaka/pr-reduce-unused-function-parameters

Remove unused function parametes.
Merge pull request #788 from masamitsu-murase/modify_range_initialize

Modify range initialize to prevent segmentation fault.
Merge pull request #766 from masuidrive/mrbint64

Fixed MRB_INT64 warning
Merge pull request #790 from carsonmcdonald/nogemdefchange

Change the way that the DISABLE_GEMS flag is set.
Fixed minor typo.
Merge pull request #798 from carsonmcdonald/typofix

Fixed minor typo.
Merge pull request #796 from masuidrive/vs2012

Added .lib extension for library file on VS2012