Debugging OneColumn example site

component.baseStyle() now works (again) to define the global style
behavior of a theme as root for the more specific styles of the child
components. Change SassBuilder accordingly.
Updated comments and docstrings of methods.
component.baseStyle( ) now calls component.newStyle( ) to create a new
Style instance.
Set fonts to Webtype fonts (need to split the long WT, because it now
loading the whole set, which is not representative slow).
Rename BlockQuote to PullQuote.
Add C.CLASS_PULLQUOTE