start of tests refactoring; sqlite3 new wrapper fixes

tests/accept/run/tassert.nim

@@ -0,0 +1,16 @@
+# test assert and exception handling
+
+proc callB() = assert(False)
+proc callA() = callB()
+proc callC() = callA()
+
+try:
+  callC()
+except EAssertionFailed:
+  write(stdout, "assertion failure!")
+except:
+  write(stdout, "unknown exception!")
+finally:
+  system.write(stdout, "this shall be always written")
+
+assert(false) #OUT assertion failure!this shall be always written