Enable the manual peaklist input example in the vignette, closes #67

vignettes/RMassBankXCMS.Rnw

@@ -169,7 +169,7 @@ note that the naming of the csv has to be similar to the mzdata-files,
 with the only difference being the filename extension.  The readMethod
 name for this is "peaklist"
 
-<<eval=FALSE>>=
+<<>>=
 msmsPeaklist <- newMsmsWorkspace()
 msmsPeaklist@files <- list.files(system.file("spectra.Glucolesquerellin",
                                              package = "RMassBankData"),