Figure out and document the build and test instructions

[volkertb]

Although the ultimate goal is to port the code to an open source assembler dialect such as FASM (see #1), a first step would be to figure out and document how to build the artifacts (temu.com and vsb.com) using the original toolchain, as well as how to build the tests, which are written in Turbo Pascal.

Embarcadero currently offers versions of Borland C and Turbo Pascal for free legal download for people who register on-line on their site. I have had some success in assembling and linking the sources, although the resulting COM executables do not appear to have the same exact checksum as the COM files that were included in the ZIP archive that contained the sources.

NOTE: Apparently, one of the included Pascal source files, mvsb.pas, compiles into a tool that makes up part of the build chain. This specific tool is responsible for combining the QEMM-specific version of VSB and the clean DOS version of VSB into a single unified executable (COM?) file.

The exact versions and hashes of the proprietary utilities that were apparently used for assembling and linking the Assembly sources:

name	version	size	date	SHA-256	what it does	OSS alternative
exe2bin.exe	?	27232	1994-07-11	31f0dc09a03874f674127693f546d401bda8f885e9fc1c0720c005a209f847ac	Converts single-segment EXEs to COMs	Yes, bundled with FreeDOS
tasm.exe	3.2i	214097	1995-12-29	9159877479b2e6001b7d566b269675b3b67501e4bdc910d6857d673f1f0ed545	Assembles assembly code to object code	none that are fully compatible
tlib.exe	?	34646	1994-11-10	f91295a413331d6a0e7478c431a8de2b12ec57d1fb321e55cde4e555c9990dac	OS/2 utility???	OS/2 utility???
tlink.exe	3.01	143329	1994-11-10	b23826239ac2e89f49aef927f24d0a85dc3c0ea940557f066c0383db49c4363a	links object code to executable binaries	possibly, requires further research