First draft to be able to use stdin as an input for submitting fwknop key.

mrash/fwknop#74
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Interim commit to be able to load key from file descriptor (fd 0 for example).
Added backwards compatibility section to the client man page

Added backwards compatibility section and new material on a 'quick start'
subsection for the EXAMPLES section.
Updated copyright dates, removed NEWS file in favor of the ChangeLog
restored the NEWS file since autoconf seems to need it
started on libfko.texi function prototype and FKO error code documentation updates
Adding support for reading encryption/key password from a file descriptor.

 * Added tests to the test suite.
 * Updated the usage message.
 * Fixed the password functions.

reference : mrash/fwknop#74
Merge remote-tracking branch 'upstream/master'

Conflicts:
	client/config_init.c
[test suite] added backwards compatibility test for truncated keys longer > 16 chars
[test suite] minor bug fix to include the new legacy long key file in Makefile.am
Merge remote-tracking branch 'fjoncourt/master'

Closes #74 - allows a passphrase to be read from STDIN or from a file descriptor
via --fd.