Allow people to use this role for single machines without defining any
master or agent groups.

Avoiding having lots of files to look through and instead put everything
in a single place for easier lookup and modification.

Simplify this check by using package_facts, which avoid having to have
distro specific tasks.

Unfortunately dpkg doesn't handle all upgrades properly, so we need to
use the apt command instead in order for package replacements to work.

ThinLinc will be packaged as a single file in the next version. Prepare
for this in the ansible role.

* Reworked templates to handle true/false bools set by users

…ible style (note: FQCN are not yet in place)

…le style (note: FQCN are not yet in place)

* Added check for installed software
* Reworked all ansible_* facts to 'new' naming scheme ansible_facts['*']

Multiple fixes

…linc-server