Whoops fix dumb bug in isLogLevelAtLeast
Show possible display values for parameter

Since the --parameter argument is limited to accepting values between 0.0 and
1.0, using --display-info --verbose can be used to generate a table of sorts
for users who need to find the exact values that a plugin will have after
setting parameters.

Fixes issue #161
Show new parameter value after setting it

Fixes issue #162