Merge pull request #307 from QuantEcon/oop_names_edits

Split first OOP / names / namespaces lecture in two

Author: jstac

.gitignore

@@ -4,4 +4,8 @@ __pycache__/
 dask-worker-space
 
 .vscode/
-.ipynb_checkpoints/
+.ipynb_checkpoints/
+
+lectures/mathfoo.py
+lectures/mod.py
+lectures/test.py

lectures/_toc.yml

@@ -10,6 +10,7 @@ parts:
   - file: functions
   - file: python_essentials
   - file: oop_intro
+  - file: names
   - file: python_oop
   - file: workspace 
 - caption: The Scientific Libraries