Merge pull request #1083 from bnavigator/osx-no-mkl · python-control/python-control@a2c3b4c

Original file line number	Diff line number	Diff line change
`@@ -10,10 +10,8 @@`
`10`	`10`	`'win': 'windows',`
`11`	`11`	`}`
`12`	`12`
`13`		`-blas_implementations = ['unset', 'Generic', 'OpenBLAS', 'Intel10_64lp']`
`14`		`-`
`15`		`-combinations = {'ubuntu': blas_implementations,`
`16`		`-'macos': blas_implementations,`
	`13`	`+combinations = {'ubuntu': ['unset', 'Generic', 'OpenBLAS', 'Intel10_64lp'],`
	`14`	`+'macos': ['unset', 'Generic', 'OpenBLAS'],`
`17`	`15`	`'windows': ['unset', 'Intel10_64lp'],`
`18`	`16`	`}`
`19`	`17`