fomu-evt: correct permalinks and add redirect_from

Use the new "Fomu" nomenclature, and still accept the old "fpga-evtX" syntax.

Signed-off-by: Sean Cross <sean@xobs.io>

fomu-evt1.md

@@ -2,6 +2,9 @@
 layout: default
 title: A Prototype of an FPGA In Your USB Port
 permalink: /fomu-evt1/
+redirect_from:
+  - /fpga-evt1/
+  - /fpga-evt1
 ---
 
 <style>

fomu-evt2.md

@@ -1,7 +1,10 @@
 ---
 layout: default
 title: A Prototype of an FPGA In Your USB Port
-permalink: /fpga-evt2/
+permalink: /fomu-evt2/
+redirect_from:
+  - /fpga-evt2/
+  - /fpga-evt2
 ---
 
 <style>