注释未能安装的gem

Gemfile

@@ -43,7 +43,7 @@ group :development, :test do
 	gem 'spork-testunit'
 	gem 'guard-spork'
 	gem 'guard-test', '~> 1.0.0'
-	gem 'ruby-prof'
+	#gem 'ruby-prof'
 	gem 'pry'
 	gem 'pry-nav'
 end

Gemfile.lock

@@ -100,7 +100,6 @@ GEM
     hike (1.2.3)
     htmlentities (4.3.2)
     i18n (0.6.1)
-    iconv (1.0.4)
     journey (1.0.4)
     jquery-rails (2.0.3)
       railties (>= 3.1.0, < 5.0)
@@ -190,7 +189,6 @@ GEM
       sass-rails
     rmagick (2.13.2)
     ruby-openid (2.1.8)
-    ruby-prof (0.15.1)
     rubyzip (1.1.6)
     sass (3.3.10)
     sass-rails (3.2.6)
@@ -235,8 +233,6 @@ GEM
     win32console (1.3.2-x86-mingw32)
     xpath (1.0.0)
       nokogiri (~> 1.3)
-    zip-zip (0.3)
-      rubyzip (>= 1.0.0)
 
 PLATFORMS
   ruby
@@ -257,7 +253,6 @@ DEPENDENCIES
   guard-test (~> 1.0.0)
   htmlentities
   i18n (~> 0.6.0)
-  iconv
   jquery-rails (~> 2.0.2)
   kaminari
   mocha (~> 0.13.3)
@@ -273,12 +268,9 @@ DEPENDENCIES
   rich (= 1.4.6)
   rmagick (>= 2.0.0)
   ruby-openid (~> 2.1.4)
-  ruby-prof
-  rubyzip
   sass-rails (~> 3.2.3)
   seems_rateable!
   shoulda (> 3.3.2)
   spork-testunit
   therubyracer
   uglifier (>= 1.0.3)
-  zip-zip

db/schema.rb

@@ -379,6 +379,7 @@ ActiveRecord::Schema.define(:version => 20140714081030) do
     t.text     "description"
     t.datetime "created_on"
     t.integer  "user_id",                   :default => 0
+    t.integer  "is_public",                 :default => 1
   end
 
   add_index "documents", ["category_id"], :name => "index_documents_on_category_id"