Merge pull request #1 from thefourtheye/master

Included help command and case-insensitive string matching
Merge pull request #2 from thefourtheye/master

Displaying usage help messages for even unknown parameters
Correct argument names in usage text.

Also try to avoid confusion with user/username/name by using «identifier».
Merge pull request #3 from ruudud/master

Correct argument names in usage text.
Test if user exists before trying to create it

If so, guess user homedir instead of hardcoding to /home
Merge pull request #5 from aegypius/guess-homedir-if-user-allready-exists

Test if user exists before trying to create it
Use @mikeyxstudios workaround to fix progrium/sshcommand#5
Rework getent test to work with set -e
Merge pull request #6 from aegypius/fix-pr5-failing-when-user-does-not-exists

Fix pr5 failing when user does not exists
Simplified readme
Merge pull request #9 from emilebosch/simplify-readme

Simplified readme
Create LICENSE
Let the system decide where a user's home directory should live