Integration of astropy.units in sunpy codebase

Attempt to integrate the astropy.units into sunpy. Every function that were taking or giving a quantity now must have astropy quantity associated with them. Please tell me if I have made mistakes anywhere, or if it could be done in better way, I will make changes! 
Thank you!   
I'm not sure of this test... I imagine that this is testing the results from VSO.  How can we know that 10 and 20 from the provider needs to be Angstroms? I would think that dump should contain the unit as it was previously, and when loading it using the query_decode we get it to read the units.