Use VCR / WebMock for testing Namecheap replies

[parasquid]

https://github.com/vcr/vcr will record api replies from Namecheap so we have a static, predictable, unchanging reply from which we can base our tests on.

https://github.com/bblimke/webmock intercepts web calls and mocks them out so tests are fast and we don't have to be online.

Together they make for a more robust test suite.

[dmyers]

Yeah VCR and WebMock look great.

[parasquid]

I've been working with VCR and WebMock on company projects, and while they're great for integration tests, they can make the test suite more fragile and very hard to maintain.

We should still use the two gems, but I think I'll do some more refactoring of the code and do proper tests to exercise objects better without the use of VCR.