[Rivet] Warning: change to analysis loader!

[Andy Buckley]

Hi Riveters,

Be careful about updating Rivet SVN at the moment: today I made some 
major commits which break backwards compatibility and will probably 
interact unhappily with existing installations.

The changes consist of a new analysis plugin loader system which reduces 
the boilerplate code required when writing an analysis (including 
removing the need for analysis header files), and also make it easier to 
split the plugin analyses into multiple per-expt libraries. The new 
loader system now only loads plugin libraries of the form Rivet*.so, 
(i.e. the old name lib*Rivet*.so won't be loaded) and the loading 
mechanism and API are completely different. The AnalysisLoader package 
also changed, so the bundled pyext files will break: for now, please 
either use HepMC 2.5, for which I've done the update, or delete the 
rivet_wrap.cc* and rivet.py* files.

So be careful with the update, let me know about any problems, and I 
hope you'll enjoy the new system once the smoke clears ;)

Andy

-- 
Dr Andy Buckley
Particle Physics Experiment Group, University of Edinburgh