DOC fix typo
Merge pull request #106 from jnothman/patch-1

DOC fix typo
REL say that 0.2 is the current release
MISC remove IPython debugging traces.
make lp default inference in plot_svm_objectives
Add FrankWolfeSSVM learner to references.
remove "main" from plot_snakes example.
Add chain CRF to references.
Add paper reference.