more easy on a ubuntu 9.10 system to install couchapp

adding the couchapp's PPA to Ubuntu 9.10 (Karmic) and later

$ sudo add-apt-repository ppa:couchapp/couchapp

Executing: gpg --ignore-time-conflict --no-options --no-default-keyring --secret-keyring /etc/apt/secring.gpg --trustdb-name /etc/apt/trustdb.gpg --keyring /etc/apt/trusted.gpg --primary-keyring /etc/apt/trusted.gpg --keyserver keyserver.ubuntu.com --recv E9AE0C6F64E1127BDAB2C06D9180CDCB0CC91448
gpg: ....
gpg: ....
gpg: ...: 1 (RSA: 1)

$ sudo apt-get update