[Bug-apl] fixes and wishlist

[enztec]

WISHLIST and FIXES

the HOWTOs/Adding-System-Functions.html doesn't seem to be copied to 
/usr/local/share/doc/apl/ with make install along with the rest of the HOWTOs

put time stamp into apl.history

put the date that the https://www.gnu.org/software/apl/apl.html is created near 
the top - to help people know that there have been changes and a new apl.html
(like on libapl)

add a simple reference in the apl.html to the other dirs of interest that exist 
in the src
specifically the   html   dir that has gnuapl code layout (doxygen)
and websock and web-home dirs

for --with-libapl   the  make install    to only install the  new libs and 
libapl,h  (and not all the other workspaces etc)  it currently overwrites what 
is already there
without --with-libapl (making apl) want full install with make install

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