[Rivet] Minor problems in Rivet 1.5.0

[Leif Lönnblad]

I'm very happy with the new release. Thanks a lot for all the work 
you've put into it. So far I have only found two minor things:

* I installed with --enable-unvalidated and in many cases I get an error 
message:

Rivet.AnalysisInfo: ERROR  Parse error when reading analysis data from 
/home/local/share/Rivet/LHCB_2010_S8758301.info

It seems to be due to a missing colon on the ToDo tog. I took the 
liberty of checking in my fix on the trunk.

* If I add an analysis which gets removed because of the wrong beam 
energies I get a seg-fault after the message

Analysis 'CMS_2011_S8957746' is incompatible with the provided beams: 
removing

The seg-fault comes when exiting the function 
AnalysisHandler::removeAnalysis in the destruction of the 
boost::shared_ptr<Analysis> toremove. My guess is that the CMS_blah 
object has already been destroyed, and the shared pointer now tries to 
delete it again. Unfortunately I'm not familiar enough with the boost 
pointers to figure out myself what is going wrong.

Cheers,
Leif