add tests for Gyazo#upload(image)
fix Gruntfile
add .travis.yml
 * set ENV Var for travis-ci
set access_token in post data
fix README
release v0.0.1
implemented "list" method  #1

implemented "delete" method  #1

return http response object  #1

fix Gruntfile
  * watch tests/ directory

update README
fix test
release v0.0.2
url -> uri