tests: rename files (00x-*.t is basic stuff, >=100-*.t are tests using IPC)

testcases/t/134-invalid-command.t

@@ -0,0 +1,12 @@
+#!perl
+# vim:ts=4:sw=4:expandtab
+#
+# 
+#
+use i3test;
+
+cmd 'blargh!';
+
+does_i3_live;
+
+done_testing;