Removes LinkSet and Scene classes
Removes history methods
Updates README
Cleans and updates HyperText.init() and README
Removes local variable names for HyperText static functions

All HyperText functions must be called as a property of HyperText (i.e.,
HyperText.foo() )
Refactored code to change "scene" to "passage"

"Passage" is a more general term, and so is a more appropriate term.
Adds Passage class
Adds onReady method to HyperText config
Adds basic macro parsing and formatting
Macro parsing and passage retrieval is now working