[Freeswitch-users] Upgrading 1.2 to 1.4

Following another thread here, I thought I would have a go at 1.4 on Ubuntu 14.04 (64 bit). I now have it installed, but before I install my own application, I thought I'd look around to find a list of changes to look out for - particularly in the config files (my application includes some freeswitch config files, based on those that came with 1.2). Couldn't quickly find an appropriate resource - anyone got any suggestions?