stickychan: Don't join channels when not connected.

When the connection is lost and znc is reconnecting, stickychan would continually try to join channels and spam messages.
Reorganize "Installing" section slightly

Originally at the time of editing, the "Installation is done with the ..." command blurb comes *before* the notice about if you're building from git.  I believe it is more sane to have that come first in the README section for installing, as it will be seen before the actual installation commands are, so people will first see that if they are building from git they'll need to run `./autogen.sh`.
modules/sasl: disable DH-BLOWFISH & AES by default

Atheme has dropped them in their git version.
https://github.com/atheme/atheme/commit/15f6d84

I would also like EXTERNAL to be trid by default, but \*Cert and \*CertFP
aren't so used and that wouldn't probably be accepted.
fixed typo in configure.ac
Merge pull request #676 from ylfchild/master

fixed typo in configure.ac
Merge pull request #639 from NuclearW/stickychan-reconnect

stickychan: Don't join channels when not connected.
Merge pull request #672 from teward/readme-patch

Reorganize "Installing" section slightly to put "git building" bit first.
Merge pull request #673 from Mkaysi/sasl

modules/sasl: disable DH-BLOWFISH & AES by default
Fix CModules::LoadModule() return message handling

[ >> ] This is an example[This is an example] [/path/to/mod.so]

becomes:

[ >> ] This is an example [/path/to/mod.so]
Add CIRCNetwork::LoadModule() helper

Makes it easier to retry loading replacement modules when
loading retired modules fail.
Retire awaynick (resolves #661)

== built-in awaynick ==

debug output on startup:

    [ .. ] Loading network module [awaynick]...
    [ !! ] Module [awaynick] aborted: retired module - see http://wiki.znc.in/awaynick
    [ .. ] Loading network module [simple_away] instead...
    [ >> ] [/Users/jpnurmi/znc/lib/znc/simple_away.so]

loadmod client command:

    <jpnurmi> loadmod awaynick
    <*status> Module [awaynick] aborted: retired module - see http://wiki.znc.in/awaynick

webadmin description:

    retired module - see http://wiki.znc.in/awaynick

webadmin load attempt:

    Unable to load module [awaynick] [Module [awaynick] aborted:
    retired module - see http://wiki.znc.in/awaynick]

== external awaynick ==

znc-buildmod:

    $ znc-buildmod awaynick.cpp
    Building "awaynick.so" for ZNC 1.5... [ ok ]

debug output on startup:

    [ .. ] Loading network module [awaynick]...
    [ >> ] [/Users/jpnurmi/.znc/modules/awaynick.so]

loadmod client command:

    <jpnurmi> loadmod awaynick
    <*status> Loaded module [awaynick] [/Users/jpnurmi/.znc/modules/awaynick.so]

webadmin description:

    Change your nick while you are away