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!   
Yes.
On 12 Jul 2014 11:59, "dpshelio" <notifications@github.com> wrote:

> In sunpy/sun/sun.py:
>
> > @@ -62,7 +64,7 @@ def solar_cycle_number(t='now'):
> >      result = (time.year + 8) % 28 + 1
> >      return result
> >
> > -def solar_semidiameter_angular_size(t='now'):
> > +def solar_semidiameter_angular_size(t=None):
>
> Are these 'now' to None a regression?
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/sunpy/sunpy/pull/1030/files#r14852743>.
>