Added more demos and support for mixed-case properties (including a new 'debugger' property in Markdown files)

devices/pc/machine/5170/ega/1152kb/win300/debugger/README.md

@@ -0,0 +1,14 @@
+---
+layout: page
+title: "IBM PC AT (Model 5170, 1152Kb, 20Mb Drive) with EGA Display and Debugger running Windows 3.00"
+permalink: /devices/pc/machine/5170/ega/1152kb/win300/debugger/
+machines:
+  - type: pc
+    id: ibm5170
+    debugger: true
+---
+
+IBM PC AT running Windows 3.00
+---
+
+{% include machine.html id="ibm5170" %}