Update libraries using Cocoapods

I have removed directly managed third-party libraries using cocoapods, and updated these dependecies.

```
# setup
$ gem install bundler
$ cd /path/to/generikacc
$ bundle install #=> just install cocoapods
$ bundle exec pod install # => install libraries via cocoapods and setup project
```

Then, we can build it.

This Pull Request does not yet contain any improvement.

see http://guides.cocoapods.org/