3 patches, #3 depends on #1 as EPS uses AFM for stringwidth too.

3 patches, #3 depends on #1 as EPS uses AFM for stringwidth too.

src/rrd_afm.[ch], src/rrd_afm_data.[ch] and changes to rrd_gfx.[ch] to
use AFM for stringwidth in SVG output.

libraries/afm with .afm files for the standard 14 postscript
fonts and perl script to create src/rrd_afm_data.c Includes small test
program to show examples of calculated stringwidth and actual
stringwidth.

Adds EPS output support.
Modifies rrd_tool.c as rrd_graph() changes the argv pointer, and
rrd_tool then always wrote the 200x100 output line to the file (which
probably doesn't do anything for png images, but eps files fail having
it after the %%EOF marker).

-- Peter Speck <speck@ruc.dk>

git-svn-id: svn://svn.oetiker.ch/rrdtool/trunk/program@118 a5681a0c-68f1-0310-ab6d-d61299d08faa