Functioning updates; parameter file definition changed

Updates:
1. dd, dr and rr pair-counts now can be calculated separately;
2. "ls_estimate" entry now becomes "bin_count_type", which enables
   separate calculation of dd, dr and rr. More definitions are
   different in the parameter file.
3. The edges of each bin are indicated in the output file.
4. The edges of each bin are located slightly differently; now "s_max"
   is the outer edge of the last bin.
5. "out_name_base" introduced, which enables better naming of the
   output files.