Merge remote-tracking branch 'origin/api_cleanup'
Merge remote-tracking branch 'paulgray/master'
Export exml_stream:parser() type
Change xml element record name to xmlel
Add protection against including exml.hrl twice.
Merge pull request #1 from arcusfelis/master

Handle double inclusion of the header gracefully
Fix to_iolist/to_binary/to_list typespecs
Export type exml_query:path/0
Add exml:to_pretty_iolist/1,3
Print elements with a single cdata child in one line
Add CHANGELOG.md with 2.1.0 tag rationale