Change the behaviour of template option

This PR addresses https://github.com/AIFDR/inasafe/issues/854

![new options](https://cloud.githubusercontent.com/assets/992519/2692279/c074a8a8-c39e-11e3-96fa-41069fcc9659.png)

@timlinux: There are some variables that are referred by some classes which I think it should be put as a default e.g the default of organisation logo path (referred by dock, report, and option dialog), or north arrow (reffered by report and option dialog). Should we put it like disclaimer on safe_qgis.utilities.default?