optimise fonts

fonts are now loaded in a hierarchy:
- title: smallest, loads first, "riki's fluffy little house" characters only
- crit: loads next, contains ASCII + some other stuff, in weights 400-900 (for body text and headings)
- full: loads last, contains everything (italics & monospace too)

content/treehouse/dev/fonts.dj

@@ -0,0 +1,27 @@
+title = "Font set testing page"
+
++++
+
+If all the characters appear in Recursive, all's right with the world.
+
+≠²³¢€½§·«»–¸
+πœę©ß←↓→óþ¨~
+ąśðæŋ’ə…ł´^
+żźć„”ńµ≤≥ḷ
+
+*bold text*
+
+_italic text_
+
+```cpp
+// This is a bit of code.
+int main(void) { return 0; }
+```
+
+# Heading 1
+
+## Heading 2
+
+### Heading 3
+
+#### Heading 4