Issue: IWSoftware/ekahau-rtls-playbook#4
* Updated documentation in line with these changes.
* Removed creation of /home/admin/log/admin directory from technician_ssh installation.
* Removed some unnecessary formatting characters from main.yml.
* Added ownership of files and folders created in main.yml.
* Added manual creation of logfiles for Webmin.
* Added conditionals to ensure that tasks are only run if global variables are set.