Merge pull request #396 from l4u/quote

Change git clone command to use double quotes instead of single quotes

lib/cocoapods/downloader/git.rb

@@ -134,7 +134,7 @@ module Pod
       end
 
       def clone(from, to)
-        git "clone '#{from}' '#{to}'"
+        git "clone \"#{from}\" \"#{to}\""
       end
     end
 

lib/cocoapods/downloader/mercurial.rb

@@ -12,11 +12,11 @@ module Pod
       end
 
       def download_head
-        hg "clone '#{url}' '#{target_path}'"
+        hg "clone \"#{url}\" \"#{target_path}\""
       end
 
       def download_revision
-        hg "clone '#{url}' --rev '#{options[:revision]}' '#{target_path}'"
+        hg "clone \"#{url}\" --rev '#{options[:revision]}' \"#{target_path}\""
       end
     end
   end

lib/cocoapods/downloader/subversion.rb

@@ -12,11 +12,11 @@ module Pod
       end
 
       def download_head
-        svn "checkout '#{url}' '#{target_path}'"
+        svn "checkout \"#{url}\" \"#{target_path}\""
       end
 
       def download_revision
-        svn "checkout '#{url}' -r '#{options[:revision]}' '#{target_path}'"
+        svn "checkout \"#{url}\" -r '#{options[:revision]}' \"#{target_path}\""
       end
     end
   end