bugfixes and updated help information
bugfixes and updated help information

bugfix: --help was not working without passing the HC file too.
bugfix: forgotten 'my' in variable declaration.

Updated help information to include dry-run mode option.

Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara