[alphametics] Warn about long running tests in the common test data.#469

Merged

Insti merged 7 commits intoexercism:masterfrom Insti:alphametics_generator

Nov 5, 2016

+212-128

Commits on Oct 24, 2016

Ignore long running tests in the common test data.
Insti
committed

Commits on Oct 29, 2016

Fix typos
Insti
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