Query Effects of Subjective Effect Index (SEI)

[keinsell]

I'm quite not sure about data structure of SEI on PsychonautWiki, however this would be valuable for users that wish to take further actions of effects, as currently they are supposed to save everything in database on the fly and there's a little lack of space.

I'm aware of that not everything will be available but let's say name and url is enough, just leave option to query all effects.