Ye Ol' π Shack

Editor Note: There appears to be a lot of output artifacts left in this commit
but its included verbatim, as delivered in the official source tar ball for
historical accuracy.  - ChipMaster

* New maths functions and append mode support from Edmond Orignac
 * Bug fixes

* Bug fixes
 * New compilation procedure for MVS and CMS

* Minor bug fixes, cosmetic improvements and portability improvements
 * Added support for compiling on MVS (IBM mainframe)