in README, indicate that <text> elements are rendered as independent paragraphs
text nodes can now have class='centered'
replace class='form' and class='formc' with a new <level> type called 'form'
turn class="table", class="tablec", and class="PlainText" into a new <level> type "table" that works the same as forms but is definitely in monospace ("PlainText" is treated the same as "table")
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