catmaid R package v0.9.1

• Add catmaid_get_labels, catmaid_set_labels, catmaid_remove_labels to
  manipulate labels (aka tags) on treenodes and connectors (#95)
• Add catmaid_get_all_labels
• Add nsoma function to return number of somata (#96)
• Add catmaid_get_treenodes_detail to get location and other information for
  many nodes at once (#94)
• Teach catmaid_get_connectors_between to find names for pre/post skids
  (optional, #93)
• Teach catmaid_get_neuronnames to handle duplicate requests efficiently (#92)
• Teach catmaid_login to accept arguments in a list (#91)