TODO:

xml-split
	- cannot decode entities, first character might become <
		- or, could prefix a space to text data
	- code as state machine in C?  contradicts the intention to be simple

try puredata

IDEA:

good file formats:
	- text
	- lines
	- TSV
		- escaped data, not quotes
		- trailing tab
	- key: value blocks
	- length [type] block
	- sequence of fixed-size structures

other reasonable file formats:
	- CSV, with "quoting" and " -> ""
	- key="value" (like shell script)
	- XML?  I don't like it much!

escaping:
	- escape: nul tab lf cr backslash  ->  \0 \t \n \r \\
	- or use entities to encode nul, tab, lf, cr  ->  &#0; &#9; &#10; &#13;
		- and we also need to use &amp; if the input was plain text