refactor: rename RDReaderView -> RDEpubReaderView, update pod config and docs

- Rename source module from RDReaderView to RDEpubReaderView
- Move all source files from Sources/RDReaderView/ to Sources/RDEpubReaderView/
- Update podspec: RDReaderView.podspec -> RDEpubReaderView.podspec
- Update Podfile, demo project, and CocoaPods config for new pod name
- Delete old RDReaderView pod support files from ReadViewDemo/Pods
- Add new RDEpubReaderView pod support files
- Update documentation (API ref, architecture, UML, conventions, etc.)
- Add FixedLayoutRotationTests
- Update .gitignore: exclude .DS_Store, manual unpack backups, _ssoft-output

Sources/RDEpubReaderView/EPUBCore/Resources/rangy-core.js

@@ -0,0 +1,13 @@
+(function() {
+  if (window.rangy) { return; }
+
+  window.rangy = {
+    initialized: true,
+    init: function() {
+      return window.rangy;
+    },
+    createRange: function(doc) {
+      return (doc || document).createRange();
+    }
+  };
+})();