Move fakes3.sh to dev folder

Applies to #217
Merge pull request #218 from Martii/devtools

Move fakes3.sh to dev folder
Add dev/fakeS3 to .gitignore in case of accidental running in the dev folder

Applies to #217
Merge pull request #219 from Martii/devtools

Add dev/fakeS3 to .gitignore in case of accidental running in the dev fo...