rc-2

Development is calming down.
We were busy with chasing the memory corruption bug
and also added a few cool new features below.

• Add share/locking support
• Add new config.sys directive INT0DIVZ. Setting it to OFF
  (it is ON by default) allows to avoid the "divizion-by-zero
  on fast CPU" problem in some games (Zool2).
  Note: it won't cure the famous "Runtime error 200" problem,
  even if it is very similar. You need a separate fix for that.
• Fix memory corruption in INSTALL= processing
• Propagate the initial CDS setup. No longer needed to redirect
  drives twice.
• Build improvements, add "make uninstall" target and more.
• Enable and use C++ RTTI - the last of the C++ features I
  wanted to never enable, but couldn't keep it that way.
  This essentially means that the desire of keeping fdpp
  within some "light-weight C++ subset" have completely failed.