Fix jshint warnings in movies/*.js

- Add missing ;
- Remove unnecessary ;
- Use === and !== comparators
- Use single quotes
- Declare variables before using them
Fix jshint warnings in tvshows/*.js

- Add missing ;
- Remove unnecessary ;
- Use === and !== comparators
- Use single quotes
- Declare variables before using them
Fix jshint warnings in music/*.js

- Add missing ;
- Remove unnecessary ;
- Use === and !== comparators
- Use single quotes
- Declare variables before using them
Fix jshint warnings in include/*.js

- Add missing ;
- Remove unnecessary ;
- Use === and !== comparators
- Use single quotes
- Declare variables before using them
watched is an integer, to set it or compare it to string values.
Set is an empty string when unset not undefined.
Update change log and bump version for issue #73.