Handle {Line,Column} in yaws_compile
Handle {Line,Column} in yaws_compile

In Erlang/OTP 24, compiler warnings and errors now include column
numbers in addition to line numbers. Change the format_errors and
format_warnings functions in yaws_compile to handle tuples of the form
{Line,Column}.

klacke/yaws,klacke/yaws,phonohawk/yaws,phonohawk/yaws,klacke/yaws,klacke/yaws,phonohawk/yaws,klacke/yaws,phonohawk/yaws,phonohawk/yaws,phonohawk/yaws,phonohawk/yaws,klacke/yaws,klacke/yaws