levels: Add tutorial08 - doing the impossible

Signed-off-by: Niels Thykier <niels@thykier.net>

Author: nthykier

ideas/snippets.txt

@@ -23,8 +23,8 @@ Solution/Movement:
 One-way one-time locks (can be rotated):
 
    +++         +++
-   _ -         +B+
+   _ -         +b+
    +c+    OR   -c-
-   +b+         + +
-   +++         +_+
+   +b+         +_+
+   +++
 

levels/tutorial08.txt

@@ -0,0 +1,18 @@
+2D SuperFun!
+++++++++
++G  b+++
++-+ c+++
++ S+_+++
+++   -b+
+++++++++
+
+button (4, 1) -> gate (4, 3)
+button (4, 1) -> gate (5, 4)
+button (6, 4) -> gate (1, 2)
+
+Description: Its impossible - you might as well give up.
+Comment: For some value of "impossible".
+Solution:
+ SE EH HH EE HH WW WW NT
+ .
+ SE EN NW NW WS SE T