Update ipptransform to use pdftops, when available, otherwise the rasterized

PostScript output.

Drop old ippevepcl and ippeveps code.

Author: michaelrsweet

.gitignore

@@ -51,10 +51,8 @@
 /cups/tlscheck
 /packaging/libcups3.list
 /scratch
-/tools/ippevepcl
 /tools/ippeveprinter
 /tools/ippeveprinter-static
-/tools/ippeveps
 /tools/ippfind
 /tools/ippfind-static
 /tools/ipptool