Add a basic XMPP component implementation, doing the authentication
Add an XmppParser, and Stanza classes
Generate events on stanza and stream open/close.
Create Stanza and serialize them.
Note: XML namespaces are not handled yet.
Rename libirc and libxmpp to irc and xmpp
Add initial CMakeLists.txt that compiles the current code
Move the basic socket implementation into the SocketHandler class
(that is, the read/write/connect/etc)
Because this code is actually common for both the IrcClient and
XmppComponent class. These two classes have to implement some higher level
callbacks (parsing the data provided in the buffers, doing stuff when the
connection is done) instead of doing the read/write/connect low level
Basic IRC message parsing/sending
First step of the connection skeleton
Basic connect, socket creating, polling, recving, etc.