Add README.md and Roadmap.md
Implemented menu

Enter s or c to run server or client respectively.
CMake support for SFML
Server listening to port 54000
Roadmap v0.1.0 - new item
Client and Server can connect

Additionally, application runs in a loop.
Add Changelog v0.1.0
Licensing
Add quick links
Fix home link
Remove home link
Merge branch 'release/v0.1.0'