[develop-olympus] Backported 3.1 unit tests to 3.0.

Start adding unit tests for bugs you fix! Tests for anything are
welcome really. We have to work on these a lot.

tests/template/templates/loop.html

@@ -0,0 +1,21 @@
+<!-- BEGIN loop -->
+loop
+<!-- BEGINELSE -->
+noloop
+<!-- END loop -->
+
+<!-- IF .loop -->
+loop
+<!-- ELSE -->
+noloop
+<!-- ENDIF -->
+
+<!-- IF .loop == 2 -->
+loop
+<!-- ENDIF -->
+
+<!-- BEGIN loop -->
+<!-- BEGIN !block -->
+loop#{loop.S_ROW_COUNT}-block#{block.S_ROW_COUNT}
+<!-- END !block -->
+<!-- END loop -->