Log Message:
Update nxtvepg to 2.5.1

Changes since 2.5.0:
    * Fixed French default shortcut "M?t?o" (did pop up an error
      message when invoked. At first start of 2.5.1 the broken
      shortcut is replaced in the rc file; if that does not work
      remove and re-define the shortcut manually via the "Shortcuts"
      menu)
    * Improved resizing: status line no longer vanishes when reducing
      (however the window bottom now "jitters" during vertical
      resizing)
    * Allow horizontal resizing of main window when in "grid" layout
      (UNIX only)
    * Display warning about "lost changes" when the window is closed
      via it's title bar "close" button, same as with the "Abort"
      button
    * TV app interaction configuration dialog: added TV app selection
      for UNIX, to select which channel table to use, i.e. select
      between xawtv or xawdecode
    * Don't require existance of .xawtv for TV app interaction on UNIX
      Thanks to "Sir Pingus" for suggesting this fix.
    * Programme list can now be scrolled by dragging with the middle
      mouse button
    * Grid layout: added +/- buttons to control column count;
      Thanks to Thorsten for suggesting these features in the
      discussion forum
    * Disabled "Show column headers" option for the grid layout
    * Grid layout: refresh no longer brings scrolled-out elements back
      into view
    * Added French network "M6" back to the EPG scan's list of "known
      providers" and documentation.
      Thanks to Thierry for pointing this out first.
    * Major bugfix in grid layout: when scrolling horizontally one
      programme could be inserted into the wrong network column under
      certain conditions
    * Bugfix EPG provider scan in non-TV-app-assisted mode: channels
      without signal often were not skipped due to uninitialized
      variable (bug was introduced in nxtvepg version 0.7.2). Thanks
      to Florian Zierer for indirectly triggering discovery of this
      bug.
    * UNIX: added new command line option "-tvdisplay" to allow
      communication with a TV app running on a different X11 server
      (e.g. a remote host). Thanks to Stefan Zoller for suggesting
      this feature.