master branch doesn't fit the tutorial

[JohnReeson]

The tutorial here and the same one in Storage doc seems for v1 branch as we can see csx mentioined, but the GitHub link points to master v2 branch.

Problem is there are inconsistencies between code of v1 and master.

1. connection is not set in master branch so blob binding detects input from Storage of Function app instead of blob Storage account.

2. Similarly, the Storage account used to save output becomes that for Function app instead of blob Storage account.

3. "THUMBNAIL_CONTAINER_NAME": "thumbnails", "THUMBNAIL_WIDTH": "100", are not mentioned in tutorial.