minimal width for integers
added: to Log: operator<<(long long s)
added: to TextStreamBase:
operator<<(long long);
operator<<(unsigned long long);
int_min_width(size_t min_width); // minimal width for integers
git-svn-id: svn://ttmath.org/publicrep/pikotools/trunk@1167 e52654a7-88a9-db11-a3e9-0013d4bc506e