libxo-1.0.0

• Add "continuation" flag, to allow multiple "xo" invocations in a single line of output (#58)
• Add --top-wrap to make top-level JSON wrappers
• Add --{open,close}-{list,instace} options
• Add xo_xml_leader(), to detect use of some bogus XML tags. It's still bad form, but it's a little safer now
• Avoid call to xo_write before xo_flush, since the latter calls the former
• Check return code from xo_flush_h properly (<0) (FreeBSD Bug 236937)
• For JSON output, avoid newline before a container's close brace (#62)
• Merge branch 'text_only' of https://github.com/zvr/libxo into zvr-text_only
• Use XO_USE_INT_RETURN_CODES, not USE_INT_RETURN_CODES
• add docs for --continuation
• add docs for --not-first
• call xo_state_set_flags before values and close containers; add XOIF_MADE_OUTPUT flag to track state; make proper empty JSON objects in xo_finish
• color_map code has to be #ifdef'd out, since the struct definition
• correct xo_flush_func_t (doesn't use xo_ssize_t)
• make depth change for --top-wrap only for JSON
• fix to handle --top-wrap in "xo" by being more consistent with handling trailing newlines
• fix to handle text-only version #64 (from zvr)
• fix xo_buf_has_room for round up to the next XO_BUFSIZ, not just add XO_BUFSIZ to the size (FreeBSD Bug 236937)
• update docs for new "xo" options
• update functions to use xo_ssize_t
• update test cases