replaces old method of known/novel 'coding' groups

get RefSeq_mRNA xrefs from CCDS where the xref maps to only 1 ensembl transcript http://www.ebi.ac.uk/panda/jira/browse/ENSCORESW-88

if RefSeq_protein xref was mapped to ensembl protein and it's corresponding RefSeq_mRNA was mapped to the transcript which produces the protein - this is treated as the best match http://www.ebi.ac.uk/panda/jira/browse/ENSCORESW-88

Adding the scope guard which is a way we can cause code to be executed even during a die. Very useful for non-global resource cleanup operations (finally blocks)

Delete a database with minimal lock interuptions and without having to use direct data file access and flushes.

Moved the filters around and made ensembldoxygenfilter.pl a standalone script to avoid having to edit the Doxygen PerlFilter installation which was our only original way of doing this. Namespacing also means dependency management is easier with less to level packages getting in the way

[ENSCORESW-202] and [ENSCORESW-203]. New ArrayExpress parser added as well as new UniParc parser. We also do the UniParc parsing and inserting into a new table in the xref schema.

Changing the AssemblyInfo adaptor name to Assembly due to concerns raised by other members in the Ensembl team. Info is too vague & therefore redundant

ENSCORESW-152. Committing the low cardinality and low row count caching framework into the core API. Implement the correct method from BaseAdaptor to have your values cached in local memory

Adding an iterator for subseqs to the Slice object. Means a lot of our code which deals with iteration of slices can delegate to this for its logic.