THRIFT-417. rb: BufferedTransport can enter an infinite loop

THRIFT-417. rb: BufferedTransport can enter an infinite loop

Switch native proto implementations to use read_all instead of read. Add a bunch of tests to verify.

Also:
- removed some commented code in binary_protocol_accelerated.c
- struct.c was missing one of the possible native method calls
- updates gem manifest (included files that didn't exist)
- fixed svn:ignores of test/rb/gen-rb and lib/java/gen-java

git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@761037 13f79535-47bb-0310-9956-ffa450edef68