Merge pull request #35 from gstamac/master

Some assertions for XDocument and XElement for XML checking
Nullable properties were never passed to any custom assertions during an assertion on structural equality. Fixed #33.
Merge branch 'master' of https://github.com/dennisdoomen/fluentassertions.git
xelement.Should().Be()/NotBe() threw when the actual object is null. Fixes #36.
Added `Be` overload to NullableSimpleTimeSpanAssertions.  Allows `Be` assertions against Nullable<TimeSpan> which should fix issue #5.
Added Arrange, Act, Assert Comments in NullableSimpleTimeSpanAssertionSpecs.cs
Update .gitignore
Added MatchRegex and NotMatchRegex assertions for issue #11
Changed method names for new unit test to new format.
Merge pull request #38 from vossad01/Issue#5

Added `Be` overload to NullableSimpleTimeSpanAssertions.
Obsoleted `BeBlank` and `NotBeBlank`.  Added `NotBeNullOrWhitespace` and `NotBeNullOrWhitespace` to fix issue #7
Updated StringAssertionSpecs to no longer use `BeBlank`, `NotBeBlank`.  Update affected method's names to newer convention.
Capitalized the 's' in Whitespace to make the method consistent with the `String.IsNullOrWhiteSpace` method
Merge pull request #40 from vossad01/Issue#7

Added `BeNullOrWhiteSpace` and `NotBeNullOrWhiteSpace` methods to StringAssertions.
Add edge case tests for MatchRegex and NotMatchRegex string assertions
Merge pull request #39 from ClockworkPenguin/master

Added MatchRegex and NotMatchRegex assertions for issue #11