Fixed spelling of 'quadradic' and added feature to alg input#2

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mariakimheinert wants to merge 2 commits into

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mariakimheinert:fix-quadradic-add-valid-alg-checking

Commits on Oct 21, 2016

Fixed the spelling of 'quadradic' and added feature to check validity of inputted name of algorithm
Ye-Eun Kim
committed
changing validAlg to local variable, adding print of algorithm options
Maria Kim
committed