Fixed lint errors from previous commit

Merge pull request #34 from OferMania/plus1

Adds deterministic id selection for BackupSelector

Merge pull request #33 from saxonparker/fix_gcc_pragmas

Uses GCC diagnostic push and pop to temporarily disable diagnostics.

Fixed API - testing_wait_for_all_tablets_normal

Removed the GLIBCXX_USE_CXX11_ABI flag from the code base.

Updated Travis CI to use Ubuntu 16.04 VM with g++ 5.4

InfUdDriver: minor code cleanup/reorganization with more documentation

Fixed a really old bug in Infiniband code: QP's max_send_sge was limited to 1

GNUmakefile: added var. LIB_PATHS to allow specifying extra linker search paths

Suppressed warnings from external headers (e.g., boost, protobuf)

cluster.py: allowed users to set prefix_command with environment variable

Included example driver config file used on CloudLab xl170

BasicTransport: simplified the maintenence of outgoing messages