change comparison description to two-and-a-half, etc.
require password authentication
bugfix: int to str conversion needed
bugfix: ug to mg conversion inverted
Merge branch 'bugfix/over-ten-conversions' into release/beta
limit all reported values to two significant digits
Merge branch 'conversions/match-labb' into release/beta
preserve full precision of user input if input units same as output units
standards: retain original representation if outunits same as standards units
Merge branch 'precision/preserve-user' into release/beta
sort by has-overages, then alphabetically
bugfix: sort order for chemicals
do not use scientific notation in canonical names
bugfix: crashes when comparison=10.0
Merge branch 'release/beta' into release/production
revert password protection