gui - Super minimal, rock-solid foundation for concurrent GUI in Go.

	Commit message (Collapse)	Author	Age	Files	Lines
*	lay/strain: add default constraints to Solver	Sam Anthony	13 days	2	-27/+80
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*	lay/strain: use synctest	Sam Anthony	13 days	1	-33/+37
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*	lay/strain: remove TODO	Sam Anthony	13 days	1	-1/+0
\| \| \| \| \|	Decided it's better to log an error and continue rather than abort early.
*	lay/strain: simplify Solver internal synchronization	Sam Anthony	13 days	3	-124/+135
\| \| \| \| \| \| \| \|	Replaced the AddConstraint() and Solve() methods' request/reply channels, used a mutex instread. Solver now closes the fieldConstrs channel automatically; removed the Close() method. Generally tidied up.
*	lay/strain: represent rectangles as (origin, size)	Sam Anthony	13 days	3	-25/+131
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*	fix compiler errors	Sam Anthony	13 days	1	-4/+4
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*	create lay/strain package	Sam Anthony	14 days	5	-0/+408
	The lay/strain package uses the Cassowary algorithm to solve systems of layout constraints.