InputExtensions generate id attribute
LabelFor generates correct ID attribute based on the field name. Closes #529
Merge pull request #530 from dsimunic/master

TextBoxFor generates valid id attribute and LabelFor references it
INCR to v3.9.42
Added test using StreamWriter
return message in error in Razor Partial
Merge pull request #534 from dchurchland/master

More complete message when Exception thrown on Razor Html Partial