remove use of 'context' instance variable
use mrb_class_get_under
use yield instead of funcall
add tests based on examples and fix bug related to it
use mrb_malloc/mrb_free
remove unnecessary malloc result checking
remove unnecessary NULL check
use created loop instead of default loop
remove unnecessary file
Merge pull request #23 from take-cheeze/refactor

Refactor mruby-uv.