start of tests refactoring; sqlite3 new wrapper fixes

tests/accept/compile/tstrtabs.nim

@@ -0,0 +1,12 @@
+import strtabs
+
+var tab = newStringTable(["key1", "val1", "key2", "val2"], 
+                         modeStyleInsensitive)
+for i in 0..80:
+  tab["key_" & $i] = "value" & $i
+  
+for key, val in pairs(tab):
+  writeln(stdout, key, ": ", val)
+writeln(stdout, "length of table ", $tab.len)
+
+writeln(stdout, `%`("$key1 = $key2; ${PATH}", tab, {useEnvironment}))