- removed 16 CR characters
 - removed 1 trailing whitespaces
 - replaced 53 tabs with spaces
 - fixed 22 svn:eol-style properties

support for enable_if and other template metaprogramming techniques),
for Clang (related to static const template class member initialisation)
and for GCC (related to forward declaration of non-int enum classes).

plus and minus, subtraction, and a lot of unit tests.

for the next implementation of large float numbers.