Merge pull request #18 from joreiff/joreiff-issue-17

Fix plugin being stuck in downloading state

fix #17

server: less verbosity on normal flow

only print debug error if there is an unexpected error when starting the
server (we expect an error when opening the socket, ie. the port is
already used).

server: force use of IPv4 for both client and server

Otherwise, it lags on Windows. ref #10

server: start server on save if it isn't running

server: idempotent style client

the client doesn't need to control the server process anymore. If there
is something running on 2442, it assumes it's the jsoncomma server. If
not, it starts it, and forgets about the process. The reason is that we
cannot reliably shutdown the process because sublime text doesn't have a
on_exit event

plugin: handle view.file_name() is None

fix #8

fix bug in server.download on mac os

fix #7

server: fix bug: always use cls instead of server

it use to be fine (cls is server use to be True), but I think that
moving server into it's own separate file breaks that equality, and so
attributes (like server.infos) were set on "cls" (server.server), and
refer to as server (json_comma.server), which obviously didn't work. I'm
not 100% confident (pretty certain there's something I'm not getting
right about this), but it works now, and it's late

server: improve confirmation box dialog

I still don't really like it though...

fix README.md#installation