cleanup self.

Example/Tests/PerformanceTest.swift

@@ -20,7 +20,7 @@ class PerformanceTest: XCTestCase {
             )
         )
 
-        self.measure {
+        measure {
             stride(from:0, to: 100000, by: 1).forEach { _ in
                 _ = start.projectiveTransform(destination: destination)
             }

Pod/Classes/Matrix3x3+3D.swift

@@ -38,7 +38,7 @@ extension Matrix3x3Type {
 
     func homogeneousInverse() -> Matrix3x3Type {
         #if arch(arm64) || arch(x86_64)
-            let result = self.inverse
+            let result = inverse
         #else
             let result = adjugate()
         #endif

Pod/Classes/Perspective.swift

@@ -17,21 +17,21 @@ public final class Perspective {
 
     lazy var basisVectorsToPointsMap: Matrix3x3Type! = {
         let m = Matrix3x3Type([
-            self.vectors[0],
-            self.vectors[1],
-            self.vectors[2]]
+            vectors[0],
+            vectors[1],
+            vectors[2]]
         )
-        let solution = m.homogeneousInverse() * self.vectors[3]
+        let solution = m.homogeneousInverse() * vectors[3]
         let scale = Matrix3x3Type(diagonal: solution)
         let basisToPoints = m * scale
         return basisToPoints.zNormalized()
     }()
 
     lazy var pointsToBasisVectorsMap: Matrix3x3Type! = {
-        self.basisVectorsToPointsMap.homogeneousInverse()
+        basisVectorsToPointsMap.homogeneousInverse()
     }()
 
     internal func projection(to:Perspective) -> Matrix3x3Type {
         return (to.basisVectorsToPointsMap * pointsToBasisVectorsMap).zNormalized()
     }
-}
+}