Created Schemazen library project

[marcio-santos-zocdoc]

@sethreno

@colin-hanson-zocdoc, @Tony-Zheng-Zocdoc, @scott-roepnack-zocdoc and me are using heavily your project here at zocdoc. These changes are to create a library that contains all schemazen functionality. The schemazen console app behaviour is the same, we added some tests as well.

Changes:

• 2 projects: Schemazen.Console and Schemazen.Library
• Schemazen.Library contains:
  • Model classes
  • Logger
  • SqlParser
  • And the new classes CompareCommand, CreateCommand and ScriptCommand. We moved logic from Create, Compare and Script classes into this new classes.
• Schemazen.Console contains all console logic and uses the Schemazen.Library

Let me know if you want to talk more about these changes.

[sethreno]

Thanks for taking the time to submit a pull request for this. There's a lot here so If I have any questions or comments I'll start the conversation on the individual commit. Cheers.

[sethreno]

I looked over these and merged them. I have a couple requests for future commits that would help make it easier for me to review:

• Please reference issue numbers in the commit message. Without this I need to review each commit and cross reference the issue list. Not a huge deal, but a little time consuming.
• Please use existing formatting. Tabs not spaces, no newline before {, etc.. Changing the formatting makes it look like the entire file changed. See 39d719a for an example. This is a common issue with pull requests I receive. From time to time I will reformat the entire solution to make it consistent. I'd prefer not to do this though as it makes the history harder to follow.

I hope I don't seem nit-picky. I do appreciate the pull request. Thanks again.