Bug fix for contained epubs

• Fixes contained epub does not render if a book asset is not found. #99

Bug fixes for loading remote compressed epubs

• Allow Cors withCredentials
• Updated uri parsing
• Decode paths for zips per #78 (comment)

Renderer Events and Bug Fixes

• Scroll Fixed Epubs
• Pass iframe events as render events such as book.on("renderer:keydown", func);
• Added event to pass text selection: ```book.on("renderer:selected", func);
• book.useSpreads(true | false) to switch from single to double columns
• update formatting and page count after Book.setStyle() changes
• Fixed compressed onload not firing on non css links
• Fixed encoding for compressed Epubs per #42
• Override zoom keys in Reader per #9
• Added book options per #81
• Use jQuery instead of $ per #74
• Fixed Icon switching in Reader per #68
• Set left position when page hasn't changed after resize to fix #85

Reader Refactor

• New Demo Reader
• Removed previous cfi location restoring
• book.goto() and book.gotoCfi() can be called before book.renderTo() to render a previous position
• Get current page cfi with book.getCurrentLocationCfi()
• renderer:pageChanged fires on first load
• Check EPUB Metadata Identifier before restoring JSON versions of Spine, Metadata and TOC from local storage.
• Fixed bugs with compressed epub url replacement
• Added externalResourcesRequired='true' to trigger SVG load event fireing

Legacy Reader

Merge pull request #79 from jkarkoszka/master

prevent to go on out of ranges page