Put in the large file for test.
Merge branch 'master' of github.com:lksoft/MailPluginManager

* 'master' of github.com:lksoft/MailPluginManager:
  Update the read me with a description of what has happened and why.
  Add all the new built 1.7.4 executables.
  Add releasable versions of MPM, Installer and Tool.