Refactor into vba-test

[timhall]

vba-test is a new approach to VBA-TDD that simplifies the API and allows for future work on more powerful assertion messages and integration with vba-blocks.

You can view a mockup of the new API here: vba-test/readme

The underlying changes are a complete rename and refactor, although the approach is generally already in use in v2.0.0-beta (with an evented suite). It may be a burdensome upgrade to map .Expect(A).ToEqual B to .IsEqual A, B, but I think it will be a welcome simplification and opens up new avenues in the future.

Closes #11
Closes #12
Closes #13
Closes #16
Closes #17
Closes #22

[timhall]

Ok, this is ready to merge, here is a short upgrade guide:

• Dim Specs As New SpecSuite to Dim Tests As New TestSuite
• Specs.It("...") to Tests.Test("...")
• .Expect(A).ToEqual B to .IsEqual A, B
• .Expect(A).ToNotEqual B to .NotEqual A, B
• .Expect(A).ToBeUndefined to .IsUndefined A
• .Expect(A).ToNotBeUndefined to .NotUndefined A
• .Expect(A).ToBeNothing to .IsOk A Is Nothing
• .Expect(A).ToNotBeNothing to .NotOk A Is Nothing
• .Expect(A).ToBeEmpty to .IsOk IsEmpty(A)
• .Expect(A).ToNotBeEmpty to .NotOk IsEmpty(A)
• .Expect(A).ToBeNull to .IsOk IsNull(A)
• .Expect(A).ToNotBeNull to .NotOk IsNull(A)
• .Expect(A).ToBeMissing to .IsOk IsMissing(A)
• .Expect(A).ToNotBeMissing to .NotOk IsMissing(A)
• .Expect(A).ToBeLT B to .IsOk A < B
• .Expect(A).ToBeLTE B to .IsOk A <= B
• .Expect(A).ToBeGT B to .IsOk A > B
• .Expect(A).ToBeGTE B to .IsOk A >= B
• .Expect(A).ToBeCloseTo B, C to .IsApproximate A, B, C
• .Expect(A).ToNotBeCloseTo B, C to .NotApproximate A, B, C
• .Expect(A).ToContain B to .Includes A, B
• .Expect(A).ToNotContain B to .NotIncludes A, B
• .Expect(A).ToMatch B to .IsOk InStr(B, A)
• .Expect(A).ToNotMatch B to .NotOk InStr(B, A)

Some of the previous matchers will most likely be added back at some point in the future, but for now I'm happy with the simplified API.