Revert "boost urxvt font size"

This reverts commit 263c2fbbb3ecbc51f9c969cb7b9a4802f26b7839.
Revert "iceweasel -> firefox"

This reverts commit c03235c81391af20660586337af2103b72851d53.
Revert "Revert "remove .yaourtrc""

This reverts commit 4a4a79484db1e206849967e6e9dd59590d8ac2d1.