cmogstored 1.4.2

* Makefile.am: gzip README and associated data
* manpage: update contact and copyright information
* update copyrights to 2014 (and all contributors)
* doc/design.txt: add a few more notes on compromises
* http_dav: log 500 errors from DELETE requests
* tapset/http_access_log: note CLF differences
* copyright updates for 2015