jefferis/rcatmaid: catmaid R package v0.7

This is a substantial release with many new functions/enhancements, changes to match the API defined by the 2016.10.18 CATMAID release, support for token-based authentication and numerous bug fixes.

• support for CATMAID token-based authentication (#35)
• Add catmaid_get_connectors_between to return connections between (multiple) pre and postsynaptic partners - thanks to Zhihao Zheng (#53, #56)
• Add function to parse CATMAID urls e.g. to extract xyz position (#55)
• Add rename_neuron function (#54)
• Add catmaid_version function (#58)
• Add catmaid_user_history function (#57)
• Add catmaid_get_annotations_for_skeletons function (#38)
• Add catmaid_remove_annotations_for_skeletons function (#43)

• Add catmaid_add_volume to add 3D meshes to catmaid (#69)

• catmaid_get_connector_table can now accept multi skid specifications (#49)

• catmaid_get_connectors_between returns more informative errors (#51)

• fix "No encoding supplied: defaulting to UTF-8." warning (#59)

• stop catmaid_skids returning duplicates when there are multiple matching annotations (#44)
• ensure that connectors are also scaled when xforming neurons (#47)
• catmaid_query_by_annotation returns neuron column as character vector (#46)
• catmaid_get_connector_table returns partner_skid columns as an integer (#48)
• fix bug in url for catmaid_get_review_status function (#45)
• Give sensible name to 1st column of connector data.frame (#42)
• ensure neurons without connectors scale properly (#41)
• fix bug in catmaid_connection_setenv() when some elements are null (#50)
• catmaid_get_annotations_for_skeletons - fix bug in skid order (#39)
• ensure catmaid_get_contributor_stats passes on connection (#37)
• ensure all functions pass on connection to catmaid_fetch (#60)
• connectors.neuronlist should handle neurons without connectors (#29)
• catmaid_skids should pass on pid (#64)
• fix catmaid_get_connector_table to reflect 2016.09.01-65 API change (#65)
• fix bug in catmaid_user_history with small queries (#70)