whitespace
remove commented code

code-deduplication: mburnett
replace temp with query

code-deduplication: mburnett
error_message when no chromosome specified

code-deduplication: mburnett
extract chr_list_when_missing_idxstats

code-deduplication: mburnett
extract class_name method

this just gets "Breakdancer" or "BreakdancerMax" for use in strings

code-deduplication: mburnett
use $self->class where appropriate

code-deduplication: mburnett
extract _get_chr_list_from_idx_file

code-deduplication: mburnett
remove valid_values

this restriction doesn't apply to BreakdancerMax

code-deduplication: mburnett
BreakdancerMax inherits from Breakdancer

code-deduplication: mburnett