M2/BUILD is git-ignored
Merge branch 'master' of github.com:kroner/M2 into NAG

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fixed an "evaluate" test; SIGSEGV substituting RR into a CC polymap (linalg branch)
random WitnessSet -- random point on a component
endgame via Cauchy theorem implemented; needs an implementation in the kernel eventually.
Merge branch 'NAG' of github.com:antonleykin/M2
todo and minor changes