Added new getAllDiseases method to DiseaseCache.
Added new getAlMouselGenes method to OrthologCache. Improved test coverage for cases where there is no disease ortholog.
Added compareTo method for sorting genes by gene symbol.
Added new methods for getting all mouse gene identifiers and diseases.
Fixed issue of single erroneous disease association appearing for genes where there should be none.
Fixed null pointer issue for cases where OMIM hadn't mapped a gene to a disease.
Added new disease and all diseases page mappings
Added new all genes page mappings
Added new disease and all diseases pages
Added new all genes page
Added correct context links for linking pages together. Helpful that.