Updated version of the Sinatra to do list app. (first created in rb_175

first created a SessionPersistence class to hold all the data to work with lists/todo items held in each user's session.
Next update will ue a database to store persisting data, beyond the browser's session

Name		Name	Last commit message	Last commit date
Latest commit History 11 Commits
ls_project_assignments		ls_project_assignments
public		public
views		views
.Gemfile.lock.swp		.Gemfile.lock.swp
Gemfile		Gemfile
Gemfile.lock		Gemfile.lock
Procfile		Procfile
README.md		README.md
config.ru		config.ru
database_persistence.rb		database_persistence.rb
jquery-3.5.1.js		jquery-3.5.1.js
schema.sql		schema.sql
session_persistence.rb		session_persistence.rb
todo.rb		todo.rb

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