better list of options for -h

Added support to sound notifications

Whitespace cleanups

Added command create_group_chat <user> <chat topic>.

Currently it supports only 1 user on creation.
Use chat_add_user to add more users to the chat.

catch NULL input in interpreter_chat_mode

Added .gitignore file

Update FreeBSD build instruction for linking with lua

Update interface.c to avoid error messages

When hitting enter (without writing anything) in an chat prompt always appears an error message telling you that the message is empty.
Checking the content of the line can avoid this.
I don't know is this behaviour is wrong or right.
So please forgive me if it doesn’t make sense.

Complete translation and small typing errors corrected

Update README.md and create README.es

Fedora don't use commas in his installation system to separate packages

Update README with new automatic path for server.pub

Help text updated.

I just added "You can see message numbers starting client with -N" to the load_photo and the view_photo description.
I've been in trouble because of not knowing how to download files so I think its use-full.
I'm not sure if it's how github works my idea was to Propose this change to the main branch.

Updated rpm with new spec

Basic Debian/Ubuntu package