Running `pod repo update` in `pod install` command. Closes #48.

lib/cocoapods/command/install.rb

@@ -19,11 +19,13 @@ module Pod
 
       def self.options
         "    --no-clean  Leave SCM dirs like `.git' and `.svn' in tact after downloading\n" +
+        "    --no-update Skip running `pod repo update` before install\n" +
         super
       end
 
       def initialize(argv)
         config.clean = !argv.option('--no-clean')
+        @update_repo = !argv.option('--no-update')
         @projpath = argv.shift_argument
         super unless argv.empty?
       end
@@ -35,6 +37,9 @@ module Pod
         if @projpath && !File.exist?(@projpath)
           raise Informative, "The specified project `#{@projpath}' does not exist."
         end
+        if @update_repo
+          Repo.new(ARGV.new(["update"])).run
+        end
         installer = Installer.new(podfile)
         installer.install!
         installer.configure_project(@projpath) if @projpath

lib/cocoapods/source.rb

@@ -13,8 +13,7 @@ module Pod
 
     def self.search(dependency)
       all.map { |s| s.search(dependency) }.compact.first ||
-        raise(Informative, "Unable to find a pod named `#{dependency.name}'.\n" \
-                           "You might want to run `pod repo update` and try again.")
+        raise(Informative, "Unable to find a pod named `#{dependency.name}'")
     end
 
     def self.search_by_name(query, full_text_search)