R: Implements Queue, PriorityQueue and Stack Classes

# Implements Queue, PriorityQueue and Stack Classes

## Documentation for package ‘liqueueR’ version 0.0.5

- DESCRIPTION file
- Package README

## Help Pages

PriorityQueue | A PriorityQueue reference class
PriorityQueue-class | A PriorityQueue reference class
Queue | A Queue reference class
Queue-class | A Queue reference class
Stack | A Stack reference class
Stack-class | A Stack reference class