v0.14.0

Breaking

• [Extract] The private Document.Node behaviour was removed, so any direct use of its callbacks with nodes will be broken
• [Extract] Comments no longer have spaces added around the content when encoding to HTML, so html output may be slightly different than before
• [Extract] A space is now only added between nodes by text extractors if the previous sibling's text didn't end in whitespace, so data, own_text, and text output may be slightly different than before

Enhancements

• [Extract] Refactor extractors, removing the Document.Node behaviour and adding that functionality to modules under Meeseeks.Extractor
• [Extract] Use iodata in string building extractors instead of string concatenation
• [Extract] Optimize how whitespace is collapsed by text extractors
• [Extract] Document which extractors collapse whitespace and make it optional (on by default)

Fixes

• [Extract] Remove incorrectly added whitespace when encoding comments to HTML
• [Extract] No longer add space between nodes when extracting text if the previous sibling's text ended in whitespace