move license terms to the bottom.
Support mrb_module_ge
remove _bless trick.  closes #8.
Merge pull request #9 from matsumoto-r/support_mrb_get_module

Support mrb_module_get
add dummy IO#flush for better compatibility with CRuby.
support older version.
compatibility support (mruby/mruby, iij/mruby and 1.0.0)

 - refs https://github.com/mruby/mruby/commit/36e234aa377d50d8ee425c7868e0651cf78e85cf
add IO.read
Merge branch 'master' of github.com:iij/mruby-io
remove unused.
quiet compiler.
Merge branch 'master' of https://github.com/iij/mruby-io into test

Conflicts:
	src/io.c