removed sqlite3 dependency as it causes heroku to fail [ci skip]

impressionist.gemspec

@@ -30,7 +30,6 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'rdoc', '>= 2.4.2'
   s.add_development_dependency 'rspec-rails'
   s.add_development_dependency 'simplecov'
-  s.add_development_dependency 'sqlite3'
   s.add_development_dependency 'systemu'
   s.add_development_dependency 'minitest'
   s.add_development_dependency 'minitest-rails'

lib/impressionist/models/mongoid/impressionist/impressionable.rb

@@ -9,10 +9,23 @@ module Impressionable
     # Overides impressionist_count in order to provied
     # mongoid compability
     def impressionist_count(options={})
-      options.reverse_merge!(:filter=>:request_hash, :start_date=>nil, :end_date=>Time.now)
-      imps = options[:start_date].blank? ? impressions : impressions.between(created_at: options[:start_date]..options[:end_date])
+      options.
+      reverse_merge!(
+        :filter=>:request_hash,
+        :start_date=>nil,
+        :end_date=>Time.now)
+
+      imps = options[:start_date].blank?
+        ? impressions :
+        impressions.
+          between(created_at: options[:start_date]..options[:end_date])
+
       filter = options[:filter]
-      filter == :all ? imps.count : imps.where(filter.ne => nil).distinct(filter).count
+
+      filter == :all ?
+        imps.count :
+        imps.where(filter.ne => nil).
+          distinct(filter).count
     end
 
   end