Fix for bed verification

Fixes the case where there are multiple outputs for one
input. The verify plates positioned correctly method was
not finding the output plate
Fixed incorrect number of tests
Fix for calliper

Stupidly didn not realise that calliper results
have well numbers that are zero padded
Merge pull request #190 from jbeast/calliper_fix

Fix for calliper
Merge pull request #182 from jbeast/bed_verification_fix

Fix for bed verification