Modified all plate queries to return the same columns, even if some
are redundant.

Modified all plate/well joins to use both barcode prefix and barcode.
Added find_sequenom_plate_id method.
Updated perldoc
Removed redundant argument
Removed collection matching wildcard
Added Sequenom metadata update script.
Merge pull request #137 from keithj/devel

Added a script to add metadata to published Sequenom data