Integrated FastILU into Ifpack2 as AdditiveSchwarz inner preconditioner (issue #197)

James Willenbring requested to merge brian-kelley:FastILU into develop

Created by: brian-kelley

-ShyLUFastILU is an optional dependency for libifpack2 -FILU, FIC, FILDL be used as inner preconditioner for AdditiveSchwarz -Preconditioners tested with an existing AdditiveSchwarz small test problem in AdditiveSchwarz unit tests -Documented in Ifpack2 user's guide (no doxygen, yet)

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