Add missing ABC_TRACE_FUNC() statements
Merge remote-tracking branch 'origin/python2.7'
Update Python compatibility information
Rename abc::text::utf8_traits::leading_to_cont_length() to lead_char_to_codepoint_size()
Change use of “leading byte” to “lead byte”
De-duplicate code and move it into abc::utf8_traits::is_lead_character()
Fix mix of character/code point counts
Fix more mixes of character/code point counts
Fix invalid assignment to const
Add abc::utf16_traits::is_lead_character(), is_surrogate(), is_trail_surrogate(), lead_char_to_codepoint_size()
Address MSC16 warning