Generate man pages from asciidoc

Working directly with g/roff is a pain.
Also changed the formatting of toxic.conf.5 a bit.

Signed-off-by: Loui Chang <louipc.ist@gmail.com>
Remove old man pages.

Signed-off-by: Loui Chang <louipc.ist@gmail.com>
Add Asciidoc to README and travis

Signed-off-by: Loui Chang <louipc.ist@gmail.com>
Add generated man pages.

Signed-off-by: Loui Chang <louipc.ist@gmail.com>
Make asciidoc 'optional'

Run `make doc` in the build directory after editing the asciidoc to
regenerate the manpages. Changes to asciidoc source and generated man
pages will need to be commited together.

Signed-off-by: Loui Chang <louipc.ist@gmail.com>
doc: Make asciidoc extra optional.

Completely separate man page generation from the main build to satisfy
travis-ci behaviour.

Signed-off-by: Loui Chang <louipc.ist@gmail.com>
Merge pull request #230 from louipc/manpage

Manpage
Reworked manpage build system
README.md: better look
README.md: second try
Merge pull request #231 from Ansa89/trivial-fix

Reworked manpage build system
add command to decline friend requests
print init messages to prompt window intead of stderr
fix error code
additional messages for startup options
add setting to set path for chatlogs
fix possible segfaults
fix segfault on unknown long option
merge