initializes dic with empty lists only if it matches to gene list.

This solves problem where output may have empty rows due to non-matching
genes.
calculate_fold_change now can handle lists, strings, or floats. log2
option renamed to log_scale

write_outdic_to_file: changes way to write from dic to file. It is now
flexible in regards to the order of the genes as they come.

get_fc_from_file: converts exprs to log scale.
fc colnames and gene colnames are optparse options now.
gene fc colname: now an optional parameter.
init commit: plots gerp score distributions.
Separates by inclusion and exclusion as well as by region.
init commit: gets inclusion and exclusion events in a dic.
plots based on whether it was hit or not.
reads tomtom results.