Added scale factor and mass flag to list_display and rearranged order of columns.
Reduced the default page length to 50, and increased the list_max_show_all to 2000.
Added a search field to the list display.
Added a filter on std units.  This will allow easier review of standard units.
Merge pull request #216 from UPDDI/Issue-#178

Issue #178
Run parser now only takes columns without blank id/no value
Permit Null values; gray null rows
Rebase on master