resolves issue #125 db: numerical identifiers should be stored as text
in the database
fixes issue #121 db: Searches with no matches should display a message
to the end user
fixes issue #116 db: table pagination information wrong when there is
only one page
- resolves issue #129 db: table view: selector to set pagination rows
- resolves issue #128 db: add "compounds studied" to the dataset view
page
resolves issue #117 db: Molecular weight to 2 significant digits
resolves issue #126 db: remove SM Facility ID as separate field in the
detail view