Make theory prediction a bit more user-friendly

[msyriac]

If I have an array for the theory C_ell prediction tcl that is defined on np.arange(lmax) where lmax is quite a bit greater than the maximum multipole in the binning scheme (say, based on the nside), I still get an error:

Traceback (most recent call last):
  File "sim.py", line 76, in <module>
    cl_th = w.decouple_cell(w.couple_cell([tcl]))[0]
  File "/home/r/rbond/msyriac/.local/lib/python3.6/site-packages/pymaster-1.0-py3.6-linux-x86_64.egg/pymaster/workspaces.py", line 142, in couple_cell
    self.wsp.ncls * (self.wsp.lmax + 1))
RuntimeError: Passing inconsistent arguments from python

I get around this by doing instead:

cl_th = w.decouple_cell(w.couple_cell([tcl[:w.wsp.lmax+1]]))[0]

but it took me a while to figure that out. Could the slicing up to w.wsp.lmax+1 be done automatically whenever the maximum multipole of the input Cls is larger than w.wsp.lmax+1?

EDIT: This is on the easier_libsharp branch.

[damonge]

Agreed, this is very annoying. Addressed here: #90

[damonge]

All done @msyriac , thanks for reporting this. I'll make a release as soon as I manage to make this pip-installable.