updated gitignore
BCCI-430 BE: Newsletter sending
removed unused portlets
BCCI-479: fix for the bug
BCCI-473: fixes for the issue
BCCI-475: fixes for the issue
BCCI-472: fixes for the issue
fixed image processing during mail sending, added processing of background images defined in the styles
fixed faulty mailing subject being displayed in edit mailing form, updated sorting of mailings and mailing table view
fixed missing error messages on mailing creation and sending test email without specified test email
fixed send email confirmation button double clicking, fixed mixed up user data during multithreaded email sending
fixed email locale during sending, added salutation as a macros, added substituting user name for code words when user name is empty
fixed an error when the image should be accessed via https instead of http
added an all-trusting certificates manager before opening a connection to get an image file
BCCI-511 Invalid displaying of umlaut in DE salutation without mentioned user name
added X-Reply-To header to the emails sent during mailing