slight cleanup to move module funcs to a 'struct module_funcs'

compiling, working, but still ugly module code

'working' modules code, and convert irc_log to use said interface, but we've hit the limits on our Makefile, and the compiled module doesn't really work

initial modules code

add irc_client module, plus nexus.h header

add test_sock_push, and filter argument to test main()

add some comments and quote (' + \) to dump_str

add dump_str function to test

update irc_conn status, and add tests for irc_conn_QUIT

add irc_net_quit and signal handling

add irc_net_destroy and fix code to be valgrind-clean on bin/test

add irc_net_error, and improve test_irc_net to cover it as well

remove irc_chan.state, modify irc_chan_callbacks.on_msg to take a irc_nm, improve error handling a bit further (up to irc_net now)

add irc_net test

improve irc_conn test

test async operation

add line_proto test, enhance others

add sock_test module and some basic initial tests

rename irc_nm to irc_proto, and move numerics from irc_cmd.h

implement irc_chan_callbacks, and add on_msg

change irc_chan.state into bool fields, move irc_cmd implementation from irc_conn.c into irc_cmd.c, remove irc_conn arg from irc_cmd_handler, add irc_conn.nickname tracking, and handle irc_chan JOINs

add irc_prefix_* functions to parse nicknames (plus sketch out some irc_nickmask stuff)

add a kind of semi-generic chain-list implementation

add doxygen.conf, and tweak comments

add line_proto_callbacks.on_error, although irc_conn doesn't pass it up

convert line_proto to use a line_proto_callbacks struct

error.c formatting

rework error to use a struct error_desc, and move ERR_SOCK/ERR_GNUTLS definitions to sock.h/sock_gnutls.h. error_desc definitions are still in error.c, though :(

add sock_gnutls_destroy, and error cleanup for sock_ssl_connect. Fix various XXX's

add sock_stream_release/line_proto_release/irc_conn_release functions, and add proper cleanup to irc_net_create