Switch from Net::HTTP to Faraday

https://github.com/lostisland/faraday

The plan is to expose the adapter as a replaceable part.
Split up Query to utilize Faraday better

Soon we can use different adapters
Clean up post.rb
Add MIT license
Alert users that breaking changes might be introduced
Tweak README
Update Gemfile example since gem isn't on Rubygems.org

Will not be uploaded until v1.0.0.
Merge branch 'master' into faraday

Conflicts:
	README.md
	lib/twingly-analytics/query.rb
Fix failing tests

* Faraday handles empty parameters somewhat differently, update cassettes.
* Set User-Agent to Ruby (just lite Net::HTTP) will update to a more specific later
Ignore .ruby-version

Often used in development, should not be commited
We're stable now

This snuck back in a7dfdbf5eeb4853bcf5b52b211f30ffd4f4139f9 i think
Bump to 1.0.1

Use Faraday instead of Net::HTTP directly. Improves HTTPS compatibility
with 1.9.3.