Release version 0.4.1.

Readme: add banjun/NorthLayout to examples, shorten podspec instructions

Explicit iOS Support (#14)  …
* Explicitly support iOS back to version 10.3 (arbitrary one version back rule)
* Set build number explicitly to ensure it is set for Carthage builds. This is required for app store submission. Add additional iOS architectures to supported list.

Remove uses of CharacterView. String is a collection again.  …
* Silences Xcode 9.1 warnings.

FootlessParser.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = 'FootlessParser'
-  s.version      = '0.4'
+  s.version      = '0.4.1'
   s.summary      = 'A simple parser combinator written in Swift'
   s.description  = 'FootlessParser is a simple and pretty naive implementation of a parser combinator in Swift. It enables infinite lookahead, non-ambiguous parsing with error reporting.'
   s.homepage     = 'https://github.com/kareman/FootlessParser'