Markdown: DOCTYPE added to generated HTML.
Cleanup: Code Formatting.
LESS: Fixes compile messages.
Adding start of media query validation to give more informative error messages
Adding support for nullable type

Adding support for comments in typescript
Analysis: (CA1305) Specify IFormatProvider.
Analysis: (CA1307) Specify StringComparison.
Analysis: (CA1304) Specify CultureInfo.
Analysis: (CA1024) Use properties instead.
Analysis: (CA1045) Don't pass types by reference.
Analysis: (CA1051) Visible instance field.
Analysis: (CA1500) Variable matching field name.
Analysis: (CA1304) Specify CultureInfo.
Analysis: (CA1024) Use properties instead.
Analysis: (CA1051) Visible instance field.
Analysis: (CA1801) Review unused parameters.
Analysis: Removed unused classes.
Analysis: (CA1804) Remove unused locals.
Analysis: (CA1806) Do not ignore method results.
Cleanup: Code formatting.