New CTAN package: hepparticles

Andy Buckley writes, through the magic of the www.tex.ac.uk upload
daemon:

> The following information was provided by the package's contributor.
> 
> Name of contribution: hepparticles
> Author's name: Andy Buckley
> Location on CTAN: /macros/latex/contrib/hepparticles
> Summary description: Macros for typesetting high energy physics particle names
> License type: lppl
> 
> Announcement text given by the package's contributor:
> ----------------------------------------------------------------------
> hepparticles is a set of macros for typesetting high energy 
> particle names, to meet the following criteria:
> 
> 1. The main particle name is a Roman or Greek symbol, to be
> typeset in upright font in normal contexts. 
> 
> 2. Additionally a superscript and/or subscript may follow the main symbol.
> 
> 3. Particle resonances may also have a resonance specifier which is
> typeset in parentheses following the main symbol. In general the
> parentheses may also be followed by sub- and superscripts. 
> 
> 4. The particle names are expected to be used both in and out of
> mathematical contexts. 
> 
> 5. If the surrounding text is bold or italic then the particle name
> should adapt to that context as best as possible (this may not be