DB changes for issue 215

This adds the `study_id` column to the `analysis_samples` table as discussed in issue #215. This also adds the two columns to the analysis_filepath table that were discussed in the Tuesday meeting. All objects and test data are also updated to reflect these added columns.
I'm unsure about these additions. Can you elaborate? Probably I'm missing something but I thought that the only needed change is to allow processed data with null fps.