Rearrange Lapack to be like BLAS. Implement cholesky decomposition

Responded to PR comments

modified travis file

Changed input and output types

added back needed types by cgo

Fixed perl script so it compiles

Changes to genLapack to allow compilation

Reinstate test-coverage.sh

lapack.go

@@ -1,8 +1,6 @@
 package lapack
 
-import (
-	"github.com/gonum/blas"
-)
+import "github.com/gonum/blas"
 
 const None = 'N'
 
@@ -21,19 +19,10 @@ const (
 	Explicit (CompSV) = 'I'
 )
 
+// Float64 defines the float64 interface for the Lapack function. This interface
+// contains the functions needed in the gonum suite.
 type Float64 interface {
-	Dgeqrf(m, n int, a []float64, lda int, tau []float64) int
-	Dormqr(s blas.Side, t blas.Transpose, m, n, k int, a []float64, lda int, tau []float64, c []float64, ldc int) int
-	Dgesdd(job Job, m, n int, a []float64, lda int, s []float64, u []float64, ldu int, vt []float64, ldvt int) int
-	Dgebrd(m, n int, a []float64, lda int, d, e, tauq, taup []float64) int
-	Dbdsdc(uplo blas.Uplo, compq CompSV, n int, d, e []float64, u []float64, ldu int, vt []float64, ldvt int, q []float64, iq []int32) int
+	Dpotrf(ul blas.Uplo, n int, a []float64, lda int) (ok bool)
 }
 
-type Complex128 interface {
-	Float64
-
-	Zgeqrf(m, n int, a []complex128, lda int, tau []complex128) int
-	Zunmqr(s blas.Side, t blas.Transpose, m, n, k int, a []complex128, lda int, tau []complex128, c []complex128, ldc int) int
-	Zgesdd(job Job, m, n int, a []complex128, lda int, s []float64, u []complex128, ldu int, vt []complex128, ldvt int) int
-	Zgebrd(m, n int, a []complex128, lda int, d, e []float64, tauq, taup []complex128) int
-}
+type Complex128 interface{}