Don't run long running and redundant tests by default

use --run-donttest to run them

Change-Id: Idec047eff02b9a3e2dababc6c6fc0347ca43e5de
diff --git a/man/percent.Rd b/man/percent.Rd
index 06e2fb3..13a1673 100644
--- a/man/percent.Rd
+++ b/man/percent.Rd
@@ -17,9 +17,11 @@
 (generated with \code{as.alternatives=T}) to percent.
 }
 \examples{
+\donttest{
 new("KorAPConnection") \%>\%
     frequencyQuery(c("Tollpatsch", "Tolpatsch"),
     vc=paste0("pubDate in ", 2000:2002),
     as.alternatives = TRUE) \%>\%
   percent()
 }
+}