Release 0.4.5
Changes in RProtoBuf version 0.4.5 (2016-08-29)
Support for version 3 of the Protcol Buffers API
Added 'syntax = "proto2";' to all proto files (PR #17)
Updated Travis CI script to test against both versions 2 and 3 using custom-built .deb packages of version 3 (PR #16)
Improved build system with support for custom CXXFLAGS (Craig Radcliffe in PR #15)