Back-merge recent fixes from master to dev

fix OSX 10.9 compiler/stdlib override for latest homebrew
follow-up on #443 to invert k channels (instead of 3)
Correctly invert the swapping of colour channels
link presentation on dropbox (was self-hosted during a dropbox issue)
link to demo
fix draw_net python script
release v1 model defs + weights
point out @niuzhiheng's work on the Windows port
fix test_all path in docs
link canonical bvlc site
fix detection notebook link