libxo-1.5.0

• #77 add docs for xo_emit_field and friends
• Fix a couple of typos in docs
• Merge branch 'patch-1' of git://github.com/0mp/libxo into develop
• The It macro should be used for list elements.
• add comments to calls that are supposed to produce warnings
• add documentation for csv encoder
• add options docs to libxo(3)
• apply "underscores" behavior to list and container open names; #80
• change "top" to "top-level" for testing #80
• fix issue where "xolint.rst" was both the doc and the list of errors, in a terribly incompatible way (read: I clobbered xolint.rst)
• fix typo in xo.1 man page (from Tomohiro Hosaka) #70
• new tests for "--libxo json,underscores" (#80)
• update tests
• use "\n" for format strings in man pages