Add IDateTimeFluentAssertion

Note that comparing Utc date kind with local date kind works like a
charm
Rename HaveSome for IsSameAs

Change "Verifies that" for "Check that"
Make some unit test more fluent by usgin variable name like christmas
Fix Checks Typo (Replace Check for Checks)
Fix typo, stylecop rules and coverage to 100%
Fix Typo again and again :-(
Add IBooleanFluentAssertion
Fix unit test related to time zone conversion
Add the Date Kind in string formatting
Make Date Comparison respect the .NET Framework
Merge branch 'master' of https://github.com/malat/NFluent

Conflicts:
	NFluent/INumberFluentAssertion.cs
	NFluent/NumberFluentAssertion.cs