Separate main css to style.css
Separate story css into single file
content_story content load html only
Initial template for extra contents

- Relative position content
- Use html5 data tag for playing audio
- Syntax / markup clean up
- Load html content only
#4 Right side indicator dom and css rewrite
#1 add data-tag and get current chapter
#3 Load content function
#2 Rewrite arrow mechanism, will center icon to window when clicked
#5 use hash tag to scroll through chapters
#6 use data-tag to get page number & fix page up page down arrows and hotkeys
remove useless image, added all 2.1-2.2 images
#7 Add custom scrollbar, add revealing content function for narractive voice over
Merge branch 'hang-fix' into jason_fill_content
merge hang's fix
2.2 section template
2.3 section template
Custom scroll bar fix for content 2_3
filled 2.1 contents
Add audiolist layout in 2_3
#8 Improve slowdown performance issue by hidden div above the viewport