Updated README.md to make the first steps more clear.
adding blank api_key.txt to example folder
fixed spelling mistake in README.md
changed Orchestr8 to AlchemyAPI in README.md removed deprecated GlobalProxySelection object from AlchemyAPI.cs class.
Merge pull request #3 from redorb8/master

Edits to README.md file and removal of deprecated object in AlchemyAPI.cs