DateFormattingService class replaced with protocol.

Add SwiftDate dependency for DateFormattingService.
Add ViewBackground enum that describes possible view backgrounds.
Add ViewText enum that describes text with appearance options.
Removed String+SizeCalculation extension.

LeadKit.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name            = "LeadKit"
-  s.version         = "0.7.1"
+  s.version         = "0.7.2"
   s.summary         = "iOS framework with a bunch of tools for rapid development"
   s.homepage        = "https://github.com/TouchInstinct/LeadKit"
   s.license         = "Apache License, Version 2.0"
@@ -69,6 +69,7 @@ Pod::Spec.new do |s|
       "Sources/Extensions/UIView/*",
       "Sources/Extensions/UIViewController/*",
       "Sources/Extensions/UIWindow/*",
+      "Sources/Extensions/Views/UILabel/*",
       "Sources/Protocols/LoadingIndicator.swift",
       "Sources/Protocols/DataLoading/PaginationDataLoading/PaginationWrappable.swift",
       "Sources/Protocols/DataLoading/GeneralDataLoading/GeneralDataLoadingController.swift",
@@ -100,6 +101,7 @@ Pod::Spec.new do |s|
     ss.dependency "RxCocoa", '~> 4.1'
     ss.dependency "RxAlamofire", '~> 4.1'
     ss.dependency "ObjectMapper", '~> 3.0'
+    ss.dependency "SwiftDate", '~> 4.5'
 
     ss.ios.dependency "TableKit", '~> 2.6'
     ss.ios.dependency "UIScrollView-InfiniteScroll", '~> 1.0.0'
@@ -126,6 +128,7 @@ Pod::Spec.new do |s|
     ss.dependency "RxCocoa", '~> 4.1'
     ss.dependency "RxAlamofire", '~> 4.1'
     ss.dependency "ObjectMapper", '~> 3.0'
+    ss.dependency "SwiftDate", '~> 4.5'
   end
 
   s.default_subspec = 'Core'