Add vim course

vimcourse_nils_2020/demos/maze

++----+-----+---+---------+---+----------+ 
+||   |     |   |         |   |     |   || 
+||S| | | | | | | | | |- -+ | | | | | | || 
+||-+ + | +-+ | | | +-+ + +-+ | | +-+ | || 
+||     |     | | |   |   |     |     | || 
+|| ----+-----+ | | --+- -+ ----+-----+ || 
+||          +--+ |       |          +--+| 
+|| | + | -+    | | +---- | | + | -+    || 
+|| |   |  +--+ | | |     | |   |  +--+ || 
+|| +---+---+ | | | +-----+ +---+---+ | || 
+||         |     |                 |   || 
+|+---+---- +---+-+------ +---+---+ |---+| 
+||   |     |   |         |   |     |   || 
+|| | | | | | | | | | |- -+ | | | | | | || 
+|+-+ | | +-+ | | | +-+ + +-+ | | +-+ | || 
+||     |     | | |   |   |     |     | || 
+|| ----+-----+ | | --+- -+ ----+-----+ || 
+||          +--+ |       |          +--+| 
+|| | + | -+    | | +---- | | + | -+    || 
+|| |   |  +--+ | | |     | |   |  |+-+ || 
+|| +---+---+ | | | +-----+ +---+--+| | || 
+||        E|     |       |         |   || 
++----------------+-------+---------+----+ 

vimcourse_nils_2020/demos/shopping_list

+Some price list
+---------------
+
+Tomatoes        - 2.50
+Pasta           - 6.20
+Sofa            - 299.00
+Trees           - 4.20
+Apples          - 2.90
+Bananas         - 3.45
+Alarm clock     - 29.95
+
+0.00