WIP: Expect API.
More expect/assert methods and tests
Updated documentation
Added detail analysis of differing strings.
Cleanup of comments
Added boolean and toString equals comparision.
Merge pull request #10 from lefou/expect

Add assertion with meaningful messages and fail late semantics 

This pull requests adds various assertions in the class de.tobiasroeser.lambdatest.Assert which give detailed informations about the difference, e.g. index where collections differ, missing elememts of sets or index position for strings.

Additionally, the class de.tobiasroeser.lambdatest.Expect provides almost exact semantics but can mantain a thread local context and supports opt-out of fail fast behavious, which means, albeit an assertion failed, it can continue to check more assertions on the go. At the end, all failed assertions will be reported.