Merge >=1.2 branch heads
Merge >=1.2 branch heads
Have graph_to_eps.h compile with both gcc-3.3 and clang++-3.2 (#471)

Hopefully, it puts an end to the story of [115031ac8001] and [761fe0846f49].
Merge headmerge to the default branch
Merge bugfix #471
Resolve clang++-3.2 'unused variable warning's in bpgraph_test.cc (#472)
Merge remote-tracking branch: upstream/master