Dump from files and POST support

This is a very interesting release for me and everyone involved in this project. Here are the highlights of this version compared to 1.0:

• POST requests are supported.
• Better handling on query parameter matching, they don't have to be in the same order as the route rule (might break compatibility, depending on how you've configured your existing routes)
• Header matching: one can configure header fields and match just as you would with payload and querystring parameters
• Possibility to read the responses from a dump file and specify the response header to help your browser and scripts "understand" what the response is.

As fake-server is getting bigger (in both features and use cases), we might start working a 2.0 branch soon to work on some cool new features. Please stay tunned and open issues. Feedback is much appreciated.

First public release

Tagging this "release" to prepare for the upcoming changes in the fake-server architecture and funcionality. please refer to README.md for overall instructions.