Makefile update to call Sweave from R

The plots are not created if R CMD Sweave is
used, maybe it defaults to some other graphics
device, or I don't know why.
Fix the tissues vignette if temporary files are present
Fix a typo in the tissues vignette
Bump eisa version number and date
Fix EISA biclust vignette for new biclust

Because it creates different biclusters and we
ended up with an empty set.