Merge pull request #18 from Ravenstine/master

Disable drag and drop
Add ENV variable that is set to '1' immediately before the Rails application starts.
Flush watchers list if the ENV['server_mode'] is set to '1', and set ENV['server_mode'] to '0' so the watchers list isn't flushed until the server restarts again.
Merge pull request #123 from nicolejpaz/flush_watchers

Flush watchers