Add support for Mac. More cleaner version.

[AnZhg]

Changes are updated due to PR #30 . Sorry I have to delete the previous branch (It was polluted by Chinese support, but I intended not to include) and start over.

Two new categories are added.

[kostub]

This is great work! Thanks for the PR. I'm merging the changes in.

It would be useful to write a travis build for the MacOS project as well. That way someone won't break it by accidentally importing UIKit without the TARGET_IPHONE directive.

[AnZhg]

I don't know what happened. Actually, this PR is merged, but #29 also shows merged. Maybe they have the same name?

How did you write the travis build for iOS? I need some help. I never work with that.

[kostub]

I think I know what happened. This PR has the commits from Chinese support PR and then it has a Cleanup commit that undoes it. Here is what you should do on your master branch:

git revert 4532586

That will undo your cleanup commit which will bring back the Chinese support. Then push your branch and create a new PR.

[AnZhg]

I have my Chinese support in master branch, and I think it needs improvements. So I created this branch and issued a PR. Anyway, I messed up my commits.

[kostub]

For travis, create a scheme file for building the MacOS version and then add it to the .travis.yml file. The xcode_schemes can be an array.

See: https://docs.travis-ci.com/user/languages/objective-c/ for documentation on how to create a scheme file.

[AnZhg]

Thank you! I learned a lot from you.

I will try to write travis build tonight when I have access to my Mac.