Rbbg - heap error fix

New Rbbg binaries are available: install.packages("Rbbg", repos =
"http://r.findata.org")
This version (0.4-155) fixes the common Java out-of-heap-space error
that sometimes crops up when many large data sets are retrieved in
series.

Details:
The blpConnect function gains a cache.responses option. The default
value of FALSE keeps only the last response in memory, rather than all
responses during this session. To get the old behavior back -- only
useful if you're trying to access the underlying Java objects -- set
cache.responses = TRUE.

-John