Methods that check relative positions fail when comparing regions on different reference sequences

Also modify tests to check it
Add dependency
Remove installation instructions
Update README.md
Update README.md
Add method "total_copy_number" in RegionCollection::Type::DoubleHashArray
Merge branch 'master' of github.com:mnsmar/GenOO
Add method for DoubleHashArray structure to loop on entries of specified secondary key
Add "foreach_record_on_rname_do" for RegionCollection types
Delete RegionCollection type "DB" as it is replaced by "DBIC".
Merge pull request #7 from mnsmar/master

Minor bug fixes and added functionality