Fixing some bugs, adding pending test examples

spec/services/process_interaction_service_spec.rb

@@ -1,5 +1,15 @@
 require 'rails_helper'
 
 RSpec.describe ProcessInteractionService do
-  pending
+  subject { ProcessInteractionService.new }
+
+  it 'creates account for new remote user'
+  it 'updates account for existing remote user'
+  it 'ignores envelopes that do not address the local user'
+  it 'accepts a status that mentions the local user'
+  it 'accepts a status that is a reply to the local user\'s'
+  it 'accepts a favourite to a status by the local user'
+  it 'accepts a reblog of a status of the local user'
+  it 'accepts a follow of the local user'
+  it 'accepts an unfollow of the local user'
 end