Changing Timestamps: utime()
Times and Dates
Formating Time
Complex Time Formatting: strftime()
Move to Documentation
Converting a Broken-Down Time to a time_t
Sorting Employees
Sort by Seniority
Sorting Directory Contents
Binary Searching: bsearch()
User and Group Names

User Database
Group Datebase
Notes on struct passwd, struct group
Print Group Information
isatty()

Modern versions of ls print filenames in columns if the standard
output is a terminal and to print them one per line if not.
Merge branch 'branch-20141227'