Adding Flask example used in lecture

Adding simple web service example written in Flask.
This service is a simple movie api for listing and adding movies
Adding the movie example using flask-restful
Adding solution for w8 exercise 6
Adding exercise w8-6
Adding solution for w8e2
Update 9. LINQ.md
Update 1. Git And GitHub.md

Added the basics on git
Merge pull request #20 from axelg12/week04Linq

Week 00 (Git basic) and Week 03 (LINQ)
Fixing merge conflict