change to checkbox for datatype selection; fix sample removal
fix id issues with checkbox
update tests to reflect changes
change select-all to include datatypes, remove proc_data_id from selected
address @wasade comments
fix int typecast
colorful county additions to search
remove unique index constraint
add select inverse
fixed sql
Merge pull request #254 from squirrelo/cleaner-sample-selection

Make study datatype selection checkboxes
Merge pull request #258 from teravest/removeuniqueindex

remove unique index constraint