Cross-client memcached compatibility

[dormando]

> 
> That's true, but there are a few things that are common that can be covered:
> 
> * Strings
> * Dates
> * Lists
> * Dictionaries
> * Fixed-precision numbers
> * Floating-precision numbers
> * Booleans
> * Blobs
> 
> Things people decide are common can be standardized.  Either way, there 
> will need to be room for things that can't be considered common.
> 

Wonder if we can just put up a list of flag recommendations (and storage 
mediums?) and see if it catches on? Or perhaps pisses someone off enough 
to provoke discussion?

-Dormando