Merge pull request #725 from ovatsus/master

Unfold optional args to overloads to make HtmlOperations more C# friendly + Add descendantsWithPath, hasId, hasClass
Update RELEASE_NOTES.md
Improve error message
Merge pull request #728 from weismat/master

Improve error message for schema Issue 727
Temp commit
Fixes failing tests for zoopla and Uk rail examples
Merge branch 'pr-726'
Fixes issue #707, &#160; should be represented as nonbreaking space. not normal space &#32.
Fixed up additional failing charref tests.
Re generated sig tests
Removed merge backup file.
Fixes issue #732 - handling tables with one column
Added Failing tests for issue # 700
Fixes issue #700 but changes the semantics of culture a little. See comment in TextConversions
Removed summary on xml docs fixes #626
Adding FX_NO_ENUMERABLE_CULTURES to release DEFINES for Portable profiles
Regenerated signature tests.
Failing test for Zoopla
Add another test failure
Fix attributeNames getting extra whitespace