PJ: partially replace drivekit/makekit.bat

We can't run the original batch file due to missing custom tools,
or lack of support for commands in DOSBox.
PJ: add makefile for drivekit/lib directory

This seemed to be missing.
PJ: partially replace picdrive/makekit.bat
PJ: disable stack overflow checks in loadable modules

Avoid undefined references to _end when creating loadable modules.
The symbol is used in stack overflow checks.
PJ: skip building flic386p and poekit

Don't know what they are.
PJ: avoid pushdir/popdir in convert
PJ: avoid pushdir/popdir in rastlib
PJ: add replacement beep

*BEEEP*
PJ: add instructions to build in dosbox
Update .gitignore.
PJ: delete tags from source control.