Update __init__.py

Some major changes:
[1] Remove dependence on Roman numerals to detect scene location info. Instead, use HTML tag "<li>" for list element. 
[2] Strengthen parsing to take into account discrepancies in expression "Titles and opening theme", "titles and credits", etc.
[2] Correct bug - complete graph: connect last event stop node in a location to its matching location stop node, and last location stop node in episode to episode stop node.
Tested, completed without error.