Merge pull request #14 from d0/master

Fix link to the doxygen documentation
renamed cvcprint to cvc-print
fixed warning about signed/unsigned mismatch
fixed check for tm_mon
added cvc-create
travis: install help2man and gengetopt
added missing read_file.h
added missing file read_file.c
cvc-create: added support for certificate description
fixed memory leak
fixed dead code
fixed bad integer conversion
fixed NULL dereferencing
splitted front page into multiple sub-pages
use a generated command line parser and man page
fixed configure check for gengetopt and help2man
fixed testing for gengetopt
don't duplicate OpenSSL structures

Use OpenSSL to parse DHParams/ECPKPARAMS even if it means slightly more
runtime overhead.
fixed signature scheme for self signed certificate
dont generate new key for self signed certificate