Merge pull request #73 from k0pernicus/three_categories

Propose three categories names for Redox side projects

src/overview/side_projects.md

@@ -27,9 +27,9 @@ Some of these tools will in the future be moved out of the default distribution,
 
 The listed tools fall into three categories:
 
-1. Tools, which are needed for a full functioning and usable system.
-2. Tools, which are "nice" to have and are inherently simple.
-3. Tools, which are there for establishing consistency within the ecosystem.
+1. **Critical**, which are needed for a full functioning and usable system.
+2. **Ecosystem-friendly**, which are there for establishing consistency within the ecosystem.
+3. **Fun**, which are "nice" to have and are inherently simple.
 
 The first category should be obvious: an OS without certain core tools is a useless OS. The second category contains the tools which are likely to be non-default in the future, but nonetheless are in the official distribution right now, for the charm. The third category is there for convenience: namely for making sure that the Redox infrastructure is consistent and integrated (e.g., Magnet, OrbTK, and libextra).