Fix documentation.
Add add lockless queues for LispWorks.

Tested with LispWorks 6.1.1 (32 bit, linux).
Skip auto-replacement of killed workers during exit on LispWorks.
use "When quitting image" action list in LispWorks
clean up feature configuration
consolidate ccl and lispworks spin queues
version 2.2.1
remove lispworks exit hook

The hook does nothing since it runs after multiprocessing shuts down.
No appropriate LW action list is currently available.
update 1am and add info
make packages.lisp reloadable again

reverts ca62e5e4723044aa953d98be8fd0f8e5756a74c2
update readme and convert to markdown
enhancements to queues and channels

* add :fixed-capacity argument to make-queue and make-channel
* add :initial-contents argument to make-queue
* include backward compatibility &rest hacks for make-queue and make-channel
* add queue-full-p
version 2.3.0
depend on alexandria
issue compile-time warnings for deprecations
version 2.3.1
replace spin-queue implementation
version 2.3.2
avoid using sb-ext:word on x86 and x86-64

support sbcl-1.0.42 and older on x86 and x86-64
version 2.3.3