Corrected Documentation
lib/Crispr/CrisprPair.pm
New File: CrisprPair - represents 2 guide RNAs used as a pair.

t/crispr_pair.t
Test File for CrisprPair.pm
lib/Crispr/OffTarget.pm
New File: OffTarget object. Holds information on off target matches
for a guide RNA.

t/off_target.t
Test File for OffTarget.pm

t/data/test_data_targets.txt
t/data/test_primer_data.tsv
t/data/test_targets_plus_crRNAs_plus_coding_scores.txt
Test data for test files.