Fix linter errors, update readme

KissXML.podspec

@@ -23,7 +23,7 @@ Pod::Spec.new do |s|
     ss.dependency 'KissXML/Core'
   end
 
-  s.ios.deployment_target = '7.0'
+  s.ios.deployment_target = '8.0'
   s.osx.deployment_target = '10.8'
   s.tvos.deployment_target = '9.0'
   s.watchos.deployment_target = '2.0'

KissXML/DDXMLElement.h

@@ -27,7 +27,7 @@ NS_ASSUME_NONNULL_BEGIN
 - (instancetype)initWithName:(NSString *)name;
 - (instancetype)initWithName:(NSString *)name URI:(nullable NSString *)URI;
 - (instancetype)initWithName:(NSString *)name stringValue:(nullable NSString *)string;
-- (nullable instancetype)initWithXMLString:(NSString *)string error:(NSError **)error NS_DESIGNATED_INITIALIZER;
+- (nullable instancetype)initWithXMLString:(NSString *)string error:(NSError **)error;
 
 #pragma mark --- Elements by name ---
 

README.markdown

@@ -19,6 +19,26 @@ KissXML is a mature library used in thousands of products. It's also used in oth
 
 KissXML was inspired by the TouchXML project, but was created to add full support for generating XML as well as supporting the entire NSXML API.
 
+### Getting Started
+
+The minimum deployment target is now iOS 8.0 / macOS 10.8 / tvOS 9.0 / watchOS 2.0.
+
+The easiest way to install `KissXML` is using CocoaPods.
+
+```ruby
+use_frameworks!
+pod 'KissXML'
+```
+
+After `pod install` open your `.xcworkspace` and import:
+
+```
+import KissXML     // swift
+@import KissXML;   //objective-c
+```
+
+### Learn More
+
 **[Get started using KissXML](https://github.com/robbiehanson/KissXML/wiki/GettingStarted)**<br/>
 **[Learn more about KissXML](https://github.com/robbiehanson/KissXML/wiki)**<br/>
 
@@ -30,6 +50,7 @@ Love the project? Wanna buy me a coffee? (or a beer :D) [![donation](http://www.
 
 ## Changelog
 
+* 5.1.0 - Jul 6 2016 - Removed need for `libxml_module` subspec by removing references to libxml in public headers. Added Obj-C generics and nullability support to match NSXML API. Added watchOS support. Minimum iOS version is now 8.0.
 * 5.0.3 - Feb 1 2016 - Removed `DDXML_NS_DECLARATIONS_ENABLED` to allow for better Swift compatibility. Added `DDXML.swift` with mappings between NSXML classes and constants and DDXML.
 * 5.0.2 - Jan 26 2016 - Enable Swift support via `libxml/module.modulemap` and `DDXML_LIBXML_MODULE_ENABLED` macro. You can use the `KissXML/libxml_module` CocoaPods subspec to enable this feature. 
 * 5.0.1 - Jan 21 2016 - Run tests on iOS and Mac targets.