Adding libiax2 to library dirs

Allow different stun server foreach account

Use SIP0 account by default

No more needs for subcall classes

New account implementation.
Need to test more and add dynamic handling in Qt Interface.
SipCall, Call, VoIPLink were rewritten completly
Configuration now in [SIP0] section of .sflphonedrc
The debug of sflphoned is very verbose.
sflphone-cli may not work right now (need to send SIP0 as accountId).

VoIPLink integration inside account
getAccount() patch for managerimpl
Remove old voiplink vector in managerimpl

First Account-based save/load implementation

Add AccountCreator and AccountMap handling
New empty AixAccount/SipAccount
Next step is internal account configuration

Add account classes and CallAccountMap functions and tests

UML for sflphone old and new design
Add comparaison matrix on iaxclient/sflphone/libeXosip2

New STUN logic to discover true firewall port (NAT)
Send true IP/port in SDP message
Remove big ###### debugging message
New logic to listening on SIP port: 2 tries

Fix Bug #1554 - Qmage::fromMimeSource: Cannot find image in the mime source factory

Support @ and : in data entry ;p (error with shift as a character)

Remove old class/struct

Nicer debugging message.
Save registration data before registring.
Move Call Enumeration to Call Class.
Receive register failed/succeed message

Two variables in sflphonedrc configuration file to disable tone or dtmf sound

Adding register failed/succeed message inside dialog

Use PORTAUDIO_LIBS variable to compile libportaudio.la with -lflags (-lasound)

Re-enable register button in configuration panel ui
Todo: to send a popup if the registration has failed or connected
Todo: use the account arg on the server

Use -DDEBUG when the user set --enable-debug=full
Use -g only if --enable-debug=yes
Don't use -02 if --enable-debug=full

Refactoring --enable-options code

Disable speex by default
Didn't find the cause yet to const SpeexMove/SpeexMove bug seen on some ubuntu distribution