Version 0.4.0

Added

• LanguageTool Server Mode has a delay of two secconds before checking
  the buffer when idle. (Close #2)
• LanguageTool Server Mode better support for external servers.

Changed

• languagetool-clear-buffer now recheck the buffer when LanguageTool
  Server Mode is active
• LanguageTool Server Mode check every time it attemps to first
  connect to a server.