doc: modernise example(s)

example3/COPYING.LESSER

example3/This_project_uses_the_project-template.txt

example3/cmake

example3/config/demo_example3.conf

example3/config/example2.dmap

example3/config/exampleApp3-DoocsVariableConfig.xml

example3/config/oven.map

example3/demoApp3.cc

example_template/CMakeLists.txt

example_template/COPYING

example_template/COPYING.LESSER

example_template/This_project_uses_the_project-template.txt

example_template/cmake

example_template/config/TemplateServer-Config.xml

...le_template/config/TemplateServer-DoocsVariableConfig.xml

example_template/config/TemplateServer.conf

example_template/config/TemplateServer.dmap

example_template/config/dummydevice.map

example_template/config/name_mapping.xlmap

example_template/include/Server.h