Improve linux building (#111)

* Improve Linux platform by adding metadata and improve description

* Improve readme

* Improve metainfo

* Fix wrong desktop file

* Improve readme

* Improve readme

* Appstream doesn't like h1

* Add CMake and Ninja to .gitignore

* Fix issues




3


4

* Revert readme keeping only Linux part

* Change comment on desktop file

* Align metainfo

* Decouple Readme from Linux building instructions

README.md

@@ -4,7 +4,7 @@
 
 ## Summary
 
-Reverse engineering of `3D Pinball for Windows – Space Cadet`, a game bundled with Windows.
+Reverse engineering of `3D Pinball for Windows - Space Cadet`, a game bundled with Windows.
 
 ## How to play