Changes

Summary

1. part 1 of ability to load books from zip files (details)

Commit fddefc1e6040e4fc3566964e5dec5df7f6d8409e by progwml6 part 1 of ability to load books from zip files
	src/mantle/books/external/ZipLoader.java
	src/mantle/books/BookDataStore.java (diff)
	src/mantle/books/client/BookImage.java
	src/mantle/books/ManualReader.java (diff)
	src/mantle/books/BookData.java (diff)
	src/mantle/lib/client/MantleClientRegistry.java (diff)
	src/mantle/client/pages/PicturePage.java (diff)