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, 17 insertions, 0 deletions

diff --git a/apps/plugins/puzzles/src/html/net.html b/apps/plugins/puzzles/src/html/net.html
new file mode 100644
index 0000000000..08bffbac3e
--- /dev/null
+++ b/apps/plugins/puzzles/src/html/net.html
@@ -0,0 +1,17 @@
+Net
+<p>
+Rotate the grid squares so that they all join up into a single
+connected network with no loops.
+<p>
+Left-click in a square to rotate it anticlockwise. Right-click to
+rotate it clockwise. Middle-click, or shift-left-click if you have
+no middle mouse button, to lock a square once you think it is
+correct (so you don't accidentally rotate it again); do the same
+again to unlock it if you change your mind.
+<p>
+Squares connected to the middle square are lit up. Aim to light up
+every square in the grid (not just the endpoint blobs).
+<p>
+When this gets too easy, select a 'wrapping' variant from the Type
+menu to enable grid lines to run off one edge of the playing area
+and come back on the opposite edge!