Fix tests to work with new TagBlock parsing format.

- These are the fixes to the tests that could not be fixed by altering the core parsing code base.
- Most involve adding TagBlock's, breaking out existing markup blocks and altering some AcceptedCharacter formats.
- Was able to loosen the restrictions on AcceptedCharacter's to allow the body of html tags to accept any character.

#75

These test fixes are here due to the changes in this PR: https://github.com/aspnet/Razor/pull/86
MarkupTagBlock's can have more than 1 child for things that have attributes.

Ex: https://github.com/aspnet/Razor/blob/TagHelpers_TagBlockParsingTestFixes/test/Microsoft.AspNet.Razor.Test/Parser/Html/HtmlAttributeTest.cs#L69-L74