Make Output Update

Updated `make_output_file_dict` function to support `flt.fits` files. 
Instead of putting `.format(fits_type)` everywhere just add it to the strings being concatenated in the `join` function like this:
```python
os.path.join(path, basename + cr + fits_type + '.fits')
```
I think that's a little easier to read because you have all the variables that make up the filename in one line.