[Dbix-class] RFC - merits of overloading ops versus not doing so

[Darren Duncan]

Thank you to both G. Wade Johnson and Rob Kinyon for your replies to my RFC; 
they have been very helpful.  I think what I will do in light of this is add 
overloading for math and string functions + shorthands ("+" parses into the same 
thing as "sum()" anyway) now, but not yet for collection types, and see how that 
goes. -- Darren Duncan