Reload database with v5

[bartonmike]

Overall:

• Tab seperated values aren't allowed in mysql upload (should be okay once going to automated, unless we want to switch to csv).

Tables

• Chemicals:
  -- Removed extraneous columns in database
  -- Expanded column variable length to fit new preferred name and SMILES

• Samples:
  -- Set default value on LocationAlternateDescription to allow for blank values
  -- changed column sampleName to SampleName

• SamplesToChemicals:
  -- environment_columns to environmental_
  -- BDL values should be float (0), these should be fixed in raw data files @bartonmike
  -- remove cas_number column