few bugs, few operations, few algorithms...

[wilkeraziz]

Hi Victor,

great job with the templates, I was trying to solve that and I was missing pystache.
Hey, I've made a few changes and added a few methods so that I could abstract a little more about the weight types in a few algorithms.

(Not for this pull request, but...) I wanted to ask you, if I organized the code in packages (including changing the setup.py, and changing the algorithms to pyx) would you feel like accepting another pull request?
I've tested here and it works, it is basically something like the following:

    pyfst/
      __init__.py
      cfst.pxd
      fst.pyx
      ...
      algorithm/
        __init__.py

Then we would have a structure like:
from pyfst.fst import LogVectorFst
from pyfst.algorithm.sampling import sample

[wilkeraziz]

So, if you want you can check my fork to see how the package thing is looking like... then if you like I'll send you the request. Cheers!

[wilkeraziz]

Ops =P disregard this one...
the modifications were working, but I edited the code directly instead of editing the tpl files =P
sorry fort that!
I have now fixed it, but I haven't committed yet, I am testing... later I am going to open another pull request, but then the package structure will be there... anyway.. tell me what you think!

Cheers

[vchahun]

Thanks Wilker for all these contributions!
I merged the simple changes, but I left the other algorithms for later when I have time to look at them...