update readme.md
update
add documentation
update documentation
update documentation of session
add NewInstanceAgainException class of session component
session component was converted to singleton pattern
session component add documentation
more complete session component and add documentation
more complete documentation
more complete documentation
more complete documentation
more complete documentation
more complete documentation
more complete documentation
add empty .gitignore file
more complete documentation
update
add composer.json
add di component's composer.json