changed distfile from calc-2.9.3t6.tar.gz to calc-2.9.3t6.tar
calc is fetched as an on-the-fly tarball from ftp.cdrom.com
gzipped on-the-fly tars are not supported.
removed trailing whitespace on several lines in PLIST
revised DESCR to <24 lines.
PLISTs.
Note: I know that this is going to break some symlinks and/or .so
includes, I will back some of these out as I run into these during
package building.
