Creating and maintaining /home/redmine/repo directory.

  Ensure that Redmine's repository directory is created and kept.
  This commit refs #16.
Set redmine user's default shell Bash.

  This commit fixes #15.
Deploy the update repository shell script.

  This commit refs #12.
Introduce the cron job in order to update Redmine's repository.

  This commit fixes #16.
Merge branch 'redmine' into dev