Add std::basic_string allocator support to StringRef, StringBuffer and relatives#441

Merged

vitaut merged 2 commits intofmtlib:masterfrom glebov-andrey:basic_string_allocator

Dec 26, 2016

+30-17

Commits on Dec 22, 2016

- added basic_string allocator support to BasicStringRef, BasicCStringRef, BasicWriter::str, StringBuffer and BasicStringWriter
glebov-andrey
committed

Commits on Dec 26, 2016

- removed templated str() and to_string() function
glebov-andrey
committed