blis: new formula
blis: new formula

BLIS - BLAS-like Library Instantiation Software

BLIS is a software framework for instantiating
high-performance BLAS-like dense linear algebra libraries.

The formula currently requires a "--with-configuration" option to
specify the framework configuration and raises an error if this option
is not specified.

Signed-off-by: Kevin Locke <kevin@kevinlocke.name>

Closes #1097.

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