Fix flake8 warning for Transform_Image.py
Fix flake8 warning for ImageJ_3D_Projection.py
Fix flake8 warning for Metadata_Search.py
Fix flake8 warning for Copy_And_Paste_Tags.py
Fix flake8 warning for Simple_FRAP.py
Fix flake8 warning for Shapes_To_Table.py
Merge pull request #2 from sbesson/flake8

Fix examples scripts to follow PEP8 style guide