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