Updated ~script.py per #978 (#1013)

* Added print function into matrix_multiplication_addition.py and removed blank space in data_structures/binary tree directory

* Removed .vs/ folder per #893

* Rename matrix_multiplication_addition.py to matrix_operation.py

* Moved and renamed ~script.py to scripts/build_directory_md.py
Updated DIRECTORY.MD file

* Modified .travis.yml per suggestion in #1013

* Fixed typo per suggestions in #1013

Author: qckzr

.travis.yml

@@ -32,5 +32,5 @@ script:
       traversals
 
 after_success:
-  - python ./~script.py
+  - python scripts/build_directory_md.py
   - cat DIRECTORY.md