New experimental model: sparql-cache

[Andy Seaborne]

I'll uploaded a small, experimental project that is an external cache 
for a SPARQL endpoint.  It also manages OFFSET/LIMIT/ORDER used for 
paging by asking the whole query and locally slicing.

Prototype.  Hardwired to cache sparql.org/books/sparql currently.
Teh project has a dependency on Google Guava for caching.  This is 
ASL-2.0 licensed.

And the code is in scala.

        Andy