Bump to 1.0.8

@dohzya, I would love your opinion on this: I figured that what to do in case the prismic.io API does something funky should probably be customized by the user, so I added it into the configuration file. Does it make sense?

Otherwise, we could add it to the helpers; but I feel like it should be handled by the user. Let me know what you think.

Same with node.js, if we put it in the user's hands (in the configuration), then they will be able to redirect it the way they want (which I'll leverage for the ongoing API issue when publishing).