added section about polymorphic function wrappers
Completed the section about declaring class templates
Added section about local and anonmous types, passed to f-templates
Added sections about extended friend declarations
Added a section about numeric_limits
Added section about template aliases
Replaced 'template function' by 'function template'
Completed the unrestricted union semantic value section in concrete/
WIP concrete/unrestricted with Bisonc++
Added the Ranger concrete example