v0.1.0

• feat: Implement a system monitoring plugin
• feat(ci): add docker image and debian packaging script
• fix(cmake): require ate least yaml-cpp 0.7.0 and fix for <0.8.0
• fix: fix warning about usage of initialised values
• fix(cmake): add initial version number
• fix(cmake): use GNUInstallDirs
• fix(nightwatch): ensure pclose is not called with NULL
• fix(publisher/nightwatch): define elos message code if not defined by elos
• fix: Fix nullptr check
• fix: Fix issues