add: user statistics

app/views/users/headmaps/index.json.jbuilder

@@ -1,5 +1,5 @@
 json.total_contributions @headmaps.collect{|map| map["contributions"]}.reduce(0, :+)
 json.headmaps @headmaps.each do |map|
-  json.date map["timestamp"]
+  json.date Time.at(map["timestamp"].to_i).strftime("%Y-%m-%d")
   json.contributions map["contributions"]
 end

app/views/users/statistics/develop.json.jbuilder

@@ -0,0 +1,19 @@
+json.platform do 
+  json.influence @platform_influence
+  json.contribution @platform_contribution
+  json.activity @platform_activity
+  json.experience @platform_experience
+  json.language @platform_language
+  json.languages_percent @platform_languages_percent
+  json.each_language_score @platform_each_language_score
+end
+
+json.user do 
+  json.influence @influence
+  json.contribution @contribution
+  json.activity @activity
+  json.experience @experience
+  json.language @language
+  json.languages_percent @languages_percent
+  json.each_language_score @each_language_score
+end

app/views/users/statistics/role.json.jbuilder

@@ -0,0 +1,19 @@
+json.total_projects_count @full_member_projects_count
+json.role do
+  json.owner do 
+    json.count @owner_projects_count
+    json.percent (@owner_projects_count.to_f/@full_member_projects_count).round(2)
+  end
+  json.manager do 
+    json.count @manager_projects_count
+    json.percent (@manager_projects_count.to_f/@full_member_projects_count).round(2)
+  end
+  json.developer do 
+    json.count @developer_projects_count
+    json.percent (@developer_projects_count.to_f/@full_member_projects_count).round(2)
+  end
+  json.reporter do 
+    json.count @reporter_projects_count
+    json.percent (@reporter_projects_count.to_f/@full_member_projects_count).round(2)
+  end
+end