Merge pull request #35 from Adys/master

Clean up --help (try 2)
Added Russian translation
Merge pull request #36 from Ilya87/Russian

Added Russian translation
fixed #37 Configuration AskOnExit should be editable via GUI
Merge branch 'master' of https://github.com/qterminal/qterminal
fixed #28 Use system qxt-devel
potential fix for screen size changed in drop down mode #31 does not resize itself when screen resolution has changed
potential fix for height calculation regarding #31 does not resize itself when screen resolution has changed
fixed #15 "Raw" -e params
fixed #4 Open new tab in same working directory
improvements for #28 Use system qxt-devel
fix "save prefs on exit". Thanks Joseph A Philbrook for reporting and support ideas
implemented #41 Request: Ctrl+M Disable Menu Bar Option
fixed #31 does not resize itself when screen resolution has changed
initial support for extended bookmarks (read only for now)
bookmarks: saving/loading/editing
bookmarks: key shortcut to open/close bookmarks widget
changes required for new qtermwidget build/structure; includes fixed for qtermwidget Qt5 port
removed un-needed file
Include QApplication where needed. Fixes #47