fixed typos, changed the look of the pretty html tables (thanks cptn for xsl advice...

fixed typos, changed the look of the pretty html tables (thanks cptn for xsl advice), and these tables are now generated as part of the Makefile process too (only requires xsltproc, which we check for already).

git-svn-id: https://conky.svn.sourceforge.net/svnroot/conky/trunk/conky@221 7f574dfc-610e-0410-a909-a81674777703