Differentiate between FIF file types.

[JasperVanDenBosch]

fix #107

• [x] travis enable mne-python
• [x] mne-type field
• [x] try different types
• [x] epochs
• [x] ave
• [x] cov
• [x] attach() only on raw
• [x] fix plogging docs
• [ ] guess file type (optional, in case brute force is too slow.)
• [x] add fields to docs

[ktavabi]

You animal

[JasperVanDenBosch]

@kambysese :) now working on the Params encoding thingy

[ktavabi]

Everything in this fucking repo is a thingy for me...I am so confused by it it's depressing