Build a lab assignment: Generate an .Rmd file for a lab assignment
web page and PDF handout.
     
    
    Usage
    build_lab_assignment(schedule, date, cal_entry, semester)
 
     
    
    Arguments
- schedule
 
A schedule data frame.
 
- date
 
The date of the lab.
 
- cal_entry
 
A calendar entry for the lab session.
 
- semester
 
A list of data for the semester, from the database.
 
 
    
    Value
    An updated schedule data frame