Fix ajax for when none occurs in Chip Raw Data
Added Date to ChipSetup and added Date hierarchy to ChipSetup and ChipStudy
In ChipReadouts changed Readout Date to Readout Start Date and elimiated Start Date.
Deleted Assay_start_date field from AssayChipReadout model.
Added Outflow to Objects of Interest for AssayReadouts
Merge pull request #253 from UPDDI/Issue-#252

Issue #252
Merge branch 'master' into Issue-#242
Remove assay_start_time from readout and add setup_date to setup