Currently heat.conf.sample is copied to heat.conf. Heat.conf needs to utilize package defaults to generate a working config.
api-paste.ini should also be moved to /usr/share/heat/ so it can be safely overwritten on upgrades and pointed to in heat.conf: [paste_deploy] api_paste_config=/usr/share/heat/api-paste-dist.ini
This was fixed in 2013.2-0.9.b3, which was released some time ago.