start of tests refactoring; sqlite3 new wrapper fixes

tests/accept/compile/ttempl3.nim

@@ -0,0 +1,26 @@
+
+template withOpenFile(f: expr, filename: string, mode: TFileMode,
+                      actions: stmt): stmt =
+  block:
+    var f: TFile
+    if open(f, filename, mode):
+      try:
+        actions
+      finally:
+        close(f)
+    else:
+      quit("cannot open for writing: " & filename)
+    
+withOpenFile(txt, "ttempl3.txt", fmWrite):
+  writeln(txt, "line 1")
+  txt.writeln("line 2")
+  
+# Test zero argument template: 
+template ha: expr = myVar[0]
+  
+var
+  myVar: array[0..1, int]
+  
+ha = 1  
+echo(ha)
+