development: preparing for Material 2.6.0 release

Material.podspec

 Pod::Spec.new do |s|
   s.name = 'Material'
-  s.version = '2.5.2'
+  s.version = '2.6.0'
   s.license = 'BSD-3-Clause'
   s.summary = 'An animation and graphics framework for Material Design in Swift.'
   s.homepage = 'http://materialswift.com'

Sources/Info.plist

@@ -15,7 +15,7 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>2.5.2</string>
+	<string>2.6.0</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>