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

ReadViewDemo/Pods/Target Support Files/RDEpubReaderView/RDEpubReaderView.debug.xcconfig

@@ -0,0 +1,16 @@
+CLANG_WARN_QUOTED_INCLUDE_IN_FRAMEWORK_HEADER = NO
+CONFIGURATION_BUILD_DIR = ${PODS_CONFIGURATION_BUILD_DIR}/RDEpubReaderView
+FRAMEWORK_SEARCH_PATHS = $(inherited) "${PODS_CONFIGURATION_BUILD_DIR}/DTCoreText" "${PODS_CONFIGURATION_BUILD_DIR}/DTFoundation" "${PODS_CONFIGURATION_BUILD_DIR}/ZIPFoundation"
+GCC_PREPROCESSOR_DEFINITIONS = $(inherited) COCOAPODS=1
+LIBRARY_SEARCH_PATHS = $(inherited) "${TOOLCHAIN_DIR}/usr/lib/swift/${PLATFORM_NAME}" /usr/lib/swift
+OTHER_LDFLAGS = $(inherited) -framework "CoreGraphics" -framework "CoreText" -framework "DTCoreText" -framework "ImageIO" -framework "MediaPlayer" -framework "QuartzCore" -framework "ZIPFoundation"
+OTHER_SWIFT_FLAGS = $(inherited) -D COCOAPODS
+PODS_BUILD_DIR = ${BUILD_DIR}
+PODS_CONFIGURATION_BUILD_DIR = ${PODS_BUILD_DIR}/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)
+PODS_DEVELOPMENT_LANGUAGE = ${DEVELOPMENT_LANGUAGE}
+PODS_ROOT = ${SRCROOT}
+PODS_TARGET_SRCROOT = ${PODS_ROOT}/../..
+PODS_XCFRAMEWORKS_BUILD_DIR = $(PODS_CONFIGURATION_BUILD_DIR)/XCFrameworkIntermediates
+PRODUCT_BUNDLE_IDENTIFIER = org.cocoapods.${PRODUCT_NAME:rfc1034identifier}
+SKIP_INSTALL = YES
+USE_RECURSIVE_SCRIPT_INPUTS_IN_SCRIPT_PHASES = YES