radioactivity 5.x-1.2-rc2

This is the second and hopefully the last release candidate for 5.x-1.2. In addition to 5.x-1.2-rc1 (see http://drupal.org/node/282882), the following bugs were fixed:

• #301230: radioactivity_node incompatible with page caching
• #301241: radioactivity_get_energies_for_source: Resolve subclass only when required (Optimization)

In addition, there is a new plugin module radioactivity_up_down_voting for up/down radioactive voting (see #300767: Negative amount and integration with Drigg). This feature might end up in Drigg.

Thanks again for Uusi Suomi (running http://www.uusisuomi.fi/ ) for funding most of the development of this release candidate, and special thanks to cedricfontaine for the new up/down voting module.