First commit! Added 'C++.tmpl' which is the header for all files.
Added first re-implementation, integer_traits.hpp. Its a now-obselete
improvement that Boost originally made; however, I decided to
implement it anyway.
Renamed Integer folder to integer. Added tests for integer_traits.c++.
Added new file templates. Switched is_integral to a function because of
static declaration/definition issues.