fenr 1.1.6

• Changed the Ensembl mapping file downloaded from Reactome to "Physical entity" mapping, as it contains gene symbols, in addition to the Ensembl IDs.
• Changed the name of GAF column DB Object Synonym from gene_synonym to gene_id for consistency with other methods.
• Changed Ensembl column ensembl_gene_id to gene_id for consistency.
• Corrected Reactome test as it failed with multiple gene symbols per gene id.
• Replaced biomaRt with a single RESTful XML call; as biomaRt is used only once to obtain GO terms, this replacement reduced dependency footprint of the package