Updated tutorial01

Author: mmoelle1

docs/tutorial01.md

@@ -14,24 +14,10 @@ It contains the following sub-folders:
 
 -   `docs` contains the documentation
 
--   `examples` contains several examples
-
 -   `filedata` contains some example data files
 
 -   `include` contains the IGAnet header files
 
--   `mex` contains some Matlab MEX functions
-
--   `ops` contains files for creating Docker images
-
--   `perftest` contains some performance tests
-
--   `python` contains the Python wrapper
-
--   `unittests` contains the unit tests
-
--   `webapps` contains the WebApp code
-
 ## Getting started
 
 In order to utilize IGAnets in your application you need to