Add random-insertion flag to random-plush-genome-with-size
Add random-insertion flag to random-plush-genome-with-size

This brings the functions in random.clj back into a working state, but
there are other calls to random-plush-instruction-map that need to be
updated. Calls to random-plush-genome-with-size do not need to be
changed unless you want the flag to be set.

Vaguery/Clojush,thelmuth/Clojush,lspector/Clojush,Vaguery/Clojush,saulshanabrook/Clojush,NicMcPhee/Clojush,NicMcPhee/Clojush,thelmuth/Clojush,saulshanabrook/Clojush,lspector/Clojush