Change handling of catch data (clf) used to apportion backscatter in the nearshore survey

[kstierhoff]

Presently, estimateNearshore uses the catch-length-frequency (clf) object from the core survey area to apportion backscatter in the nearshore region by default, and adds clf.seine if use.seine.data = TRUE. Given the differences in sampling times during 2307RL, clf and clf.seine should be combined, and then clusters/hauls should be removed if !sample.type %in% catch.source.ns.

• [x] create clf.ns and hlf.ns to replace the use of clf in estimateNearshore
• [x] create lf.final.ns
• [x] filter sample.type %in% catch.source.ns
• [x] create super.clusters.ns and super.hauls.ns

[kstierhoff]

Task completed.