Add Podspec (Correct mblsha podspec)

This is a podspec to be used with CocoaPods 0.36.0 (Currently in alpha)
Please see CocoaPods/CocoaPods#2835 for more info. It was validated using the linter check (pod spec lint).

Gemfile for testing CocoaPods 0.36.0.pre
```ruby
source 'https://rubygems.org'

gem 'cocoapods', :git => 'https://github.com/CocoaPods/CocoaPods.git', :branch => 'swift'
gem 'cocoapods-core', :git => 'https://github.com/CocoaPods/Core.git', :branch => 'swift'
gem 'xcodeproj',  :git => "https://github.com/CocoaPods/Xcodeproj.git", :branch => 'master'
gem 'claide',  :git => 'https://github.com/CocoaPods/CLAide.git'
```

Thanks @mblsha for the base podspec