I've fixed a bunch of deprecation warnings and Ruby 1.9.2 failures in the unit test suite.

I've also improved the performance of BSON::ByteBuffer and BSON::Binary by 128x in the common use case where it is only used to wrap a binary data string but not otherwise modified. I used the following test:

str = "hello world " * 1024
result = Benchmark.measure do
30_000.times do
BSON::Binary.new(str)
end
end
puts result

Original run time: 9.4 seconds
New run time: 0.07 seconds

My changes can be found at the following Github pull request: http://github.com/mongodb/mongo-ruby-driver/pull/2