[SECURITY] Fedora 21 Update: ipython-2.4.1-8.fc21

IPython provides a replacement for the interactive Python interpreter with extra functionality. Main features: * Comprehensive object introspection. * Input history, persistent across sessions. * Caching of output results during a session with automatically generated references. * Readline based name completion. * Extensible system of ‘magic’ commands for controlling the environment and performing many tasks related either to IPython or the operating system. * Configuration system with easy switching between different setups (simpl er than changing $PYTHONSTARTUP environment variables every time). * Session logging and reloading. * Extensible syntax processing for special purpose situations. * Access to the system shell with user-extensible alias system. * Easily embeddable in other Python programs. * Integrated access to the pdb debugger and the Python profiler.