addressing review comments
Merge branch 'master' of https://github.com/yet-another-user/boost.convert

Conflicts:
	include/boost/convert/detail/base.hpp
	include/boost/convert/printf.hpp
	include/boost/convert/result.hpp
	include/boost/convert/strtol.hpp
	makefile
	test/performance.cpp
	test/spirit.cpp
	test/test.hpp
cleanup