development: issue-588: fixed GridAxis memory leak issue

Material.podspec

 Pod::Spec.new do |s|
   s.name = 'Material'
-  s.version = '2.3.3'
+  s.version = '2.3.4'
   s.license = 'BSD-3-Clause'
   s.summary = 'Material is an animation and graphics framework that is used to create beautiful applications.'
   s.homepage = 'http://materialswift.com'

Sources/Info.plist

@@ -15,7 +15,7 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>2.3.3</string>
+	<string>2.3.4</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>

Sources/iOS/Grid.swift

@@ -98,14 +98,14 @@ public class Grid {
     }
     
     /// Offsets for rows and columns.
-    public var offset: GridOffset {
+    public var offset = GridOffset() {
         didSet {
             reload()
         }
     }
     
     /// The axis in which the Grid is laying out its views.
-    public var axis: GridAxis {
+    public var axis = GridAxis() {
         didSet {
             reload()
         }
@@ -154,7 +154,7 @@ public class Grid {
     }
     
     /// An Array of UIButtons.
-    public var views: [UIView] {
+    public var views = [UIView]() {
         didSet {
             for v in oldValue {
                 v.removeFromSuperview()
@@ -174,9 +174,6 @@ public class Grid {
         self.rows = rows
         self.columns = columns
         self.interimSpace = interimSpace
-        offset = GridOffset()
-        axis = GridAxis()
-        views = []
     }
     
     /// Begins a deferred block.

Sources/iOS/NavigationItem.swift

@@ -55,7 +55,7 @@ public class NavigationItem: NSObject {
 	public private(set) lazy var detailLabel = UILabel()
 	
 	/// Left items.
-    public var leftViews: [UIView] {
+    public var leftViews = [UIView]() {
         didSet {
             for v in oldValue {
                 v.removeFromSuperview()
@@ -65,7 +65,7 @@ public class NavigationItem: NSObject {
     }
 	
 	/// Right items.
-    public var rightViews: [UIView] {
+    public var rightViews = [UIView]() {
         didSet {
             for v in oldValue {
                 v.removeFromSuperview()
@@ -105,9 +105,7 @@ public class NavigationItem: NSObject {
     
 	/// Initializer.
 	public override init() {
-        leftViews = []
-        rightViews = []
-        super.init()
+		super.init()
         prepareTitleLabel()
 		prepareDetailLabel()
 	}