puzzles: refactor and resync with upstream

This brings puzzles up-to-date with upstream revision
2d333750272c3967cfd5cd3677572cddeaad5932, though certain changes made
by me, including cursor-only Untangle and some compilation fixes
remain. Upstream code has been moved to its separate subdirectory and
future syncs can be done by simply copying over the new sources.

Change-Id: Ia6506ca5f78c3627165ea6791d38db414ace0804

1 files changed, 15 insertions, 0 deletions

diff --git a/apps/plugins/puzzles/src/html/twiddle.html b/apps/plugins/puzzles/src/html/twiddle.html
new file mode 100644
index 0000000..5f94e4e
--- /dev/null
+++ b/apps/plugins/puzzles/src/html/twiddle.html
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+Twiddle
+<p>
+Rotate square sections of the grid to arrange the squares into
+numerical order starting from the top left.
+<p>
+In the basic game, you rotate a 2&times;2 square section. Left-click
+in the centre of that section (i.e. on a corner point between four
+squares) to rotate the whole section anticlockwise. Right-click to
+rotate the section clockwise.
+<p>
+When you master the basic game, go to the Type menu to try it with
+larger rotating groups (for a 3&times;3 group you must click in the
+centre of a square to rotate the block around it). Or select the
+'orientable' mode in which every square must end up the right way
+round as well as in the right place. Or both!