Add Picard's BaitDesigner and ExtractSequences tasks

[mjhipp]

Used these tasks in a pipeline and thought they belonged here.

• Allow Picard to set optional arguments if not defined by user
• Made output directory required in BaitDesigner task (optional in Picard tool)

[codecov-io]

Codecov Report

Merging #357 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #357   +/-   ##
=======================================
  Coverage   91.84%   91.84%           
=======================================
  Files          31       31           
  Lines        1140     1140           
  Branches       71       71           
=======================================
  Hits         1047     1047           
  Misses         93       93

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[nh13]

@mjhipp want to squash your commits and make your commit message a little more concise?

[mjhipp]

@nh13 sure thing, sorry about that