added a documentation index

docs/index.md

@@ -0,0 +1,25 @@
+## PsychOS
+
+PsychOS is a single-user cooperative multitasking operating system for OpenComputers.
+
+### System requirements:
+
+- T1 processor
+- 150k RAM
+- 40k storage (filesystem and tape supported)
+
+### Features
+
+- Cooperative multitasking
+- Copper (inter-)networking
+- Comfortable APIs
+- Remote login support
+- Network booting support
+
+... and probably lots more that aren't included in this list.
+
+### Documentation
+
+- User guide (WIP)
+- [Building PsychOS](building.html)
+- [API documentation](api.html)