little fix to the toEmail block to stop it crashing on delete
first draft of the categorical distribution block
categorical distirbution take two
Merge pull request #436 from mikedewar/emailfix

little fix to the toEmail block to stop it crashing on delete
check for zero normalising constnat
removed tutorials from the repo
slowly slowly
Merge pull request #438 from jacqui/dont-build-tutorials

removed tutorials from the repo
Merge pull request #437 from mikedewar/categorical

Categorical
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