Asteca

Changed
- Closed 85, 70, 43, 86.
- Metallicity and age now take steps in the GA.
- Add [checker](https://github.com/Gabriel-p/asteca/blob/master/functions/checker.py) function to make sure certain parameters are set correctly before running.
- Number of points in `get_radius` increased 20% --> 25% of the RDP (https://github.com/Gabriel-p/asteca/commit/a2e9b8f16111d5adafe66fed1eb64ed8bc03997b)

Changed
- Closed: 89, 77, 80.
- The `params_input.dat` and `semi_input.dat` files are now located at the top level next to `asteca.py`.
- Cluster's photometric files are not longer required to be stored inside a sub-folder to be picked-up by the code.

Changed
- Correct version number.

Changed
- Closed issues: 15, 73, 53, 24, 75, 79, 81, 59, 83, 78, 69, 74.
- Changed name of package (OCAAT --> ASteCA).
- Added separate function to handle the spatial 2D histogram.
- Changes to `get_center` function (now hopefully simpler)
- Added UBVI support for _V vs (U-V)_.
- Added 2MASS CMD support for _J vs (J-H)_, _H vs (J-H)_ and _K vs (H-K)_.
- Improve field star regions integrated magnitudes curve averaging.
- Simplify process of adding a new CMD.
- Added details on how the integrated magnitude calculation is done in the manual.
- Lots of minor edits/corrections.

_First beta release_

Version used (with some small changes) in the [original article](http://arxiv.org/abs/1412.2366).

See [CHANGELOG](https://asteca.readthedocs.io/en/latest/contents/changelog.html)