Add release notes for v4.1

RELEASE-NOTES-4.1

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+
+ ┌────────────────────────────┐
+ │ Release notes for i3 v4.1  │
+ └────────────────────────────┘
+
+This is the second release of the new major version of i3, v4.1. It brings some
+new (and long-awaited) features, the most prominent being tray support in i3bar
+(for NetworkManager, Skype, etc.). 
+
+The assign syntax has changed to support criteria now. Also, criteria support
+regular expressions (using PCRE) now. Check the userguide for the new syntax.
+i3-nagbar will automatically display a warning when you use the old syntax.
+
+i3 now supports startup notifications, meaning that during an application
+starts up, the mouse cursor will change to 'watch' on the root window. Also,
+the application window will appear on the workspace on which it was launched
+(not on the currently focused workspace). Some applications don’t support
+startup notifications. If the cursor change bothers you, turn it off by using
+the --no-startup-id flag (see the userguide).
+
+This release has been in use by many users and is considered stable. Please
+upgrade.
+
+
+ ┌────────────────────────────┐
+ │ New features               │
+ └────────────────────────────┘
+
+  • Switch to dpkg-source 3.0 (quilt) and compat level 7
+  • Implement system tray support in i3bar (for NetworkManager, Skype, …)
+  • i3bar is now configurable in the i3 configfile
+  • Implement support for PCRE regular expressions in criteria
+  • Implement a new assign syntax which uses criteria
+  • Sort named workspaces whose name starts with a number accordingly
+  • Warn on duplicate bindings for the same key
+  • Restrict 'resize' command to left/right for horizontal containers, up/down
+    for vertical containers
+  • Implement support for startup notifications (cursor will change to 'watch',
+    started applications show up on the workspace they have been launched on)
+  • Implement the GET_MARKS IPC request to get all marks
+  • Implement the new_float config option (border style for floating windows)
+  • Implement passing IPC sockets to i3 (systemd-style socket activation)
+  • Implement the 'move output' command to move containers to a specific output
+  • Implement focus switching for floating windows
+  • Implement the window_role criterion (for matching multi-window apps)
+  • Implement a force_xinerama configuration directive
+  • Implement the --get-socketpath, useful for scripts using the IPC interface
+  • Implement the 'move workspace next' and 'move workspace prev' commands
+  • Implement the 'workspace back_and_forth' command and related configuration
+    option
+  • Implement the move command for floating windows
+  • i3 will now handle arbitrary text arguments by sending them as an IPC
+    command, like i3-msg: 'i3 reload' or 'i3 move workspace 3'
+  • Introduce the i3-sensible-{pager,editor,terminal} scripts to execute
+    $PAGER, $EDITOR or an available terminal emulator
+  • i3-input: implement -F (format) option
+
+
+ ┌────────────────────────────┐
+ │ Bugfixes                   │
+ └────────────────────────────┘
+
+  • Bugfix: Preserve marks when restarting
+  • Bugfix: Correctly free old assignments when reloading
+  • Bugfix: Fix flickering when moving floating windows between monitors
+  • Bugfix: Correctly handle ConfigureRequests for floating windows in a
+    multi-monitor environment.
+  • Bugfix: Fix size of floating windows with X11 borders
+  • Bugfix: Always adjust floating window position when moving to another
+    output
+  • Bugfix: Avoid out-of-bounds coordinates when moving floating windows
+  • Bugfix: Don’t steal focus when a window gets destroyed
+  • Bugfix: Correctly split key/value when parsing variables
+  • Bugfix: Correctly revert focus to other floating windows when closing a
+    floating window
+  • Bugfix: Don’t leak the error logfile file descriptor
+  • Bugfix: Don’t steal focus when a window opens on an invisible workspace due
+    to assignments
+  • Bugfix: Fix handling of Mode_switch in i3-input
+  • Bugfix: Close invisible workspaces when they become empty
+  • Bugfix: Don’t invoke interactive resizing when clicking on the decoration
+    of a split container with more than one child (switch focus instead)
+  • Bugfix: Make named workspace assignments work again
+  • Bugfix: RandR: Correctly keep focus on the focused workspace when an output
+    disappears
+  • Bugfix: Insert container at the correct position on workspace level when
+    workspace_layout == default
+
+
+ ┌────────────────────────────┐
+ │ Thanks!                    │
+ └────────────────────────────┘
+
+Thanks for testing, bugfixes, discussions and everything I forgot go out to:
+
+  aksr, alexanderb, atsutane, bacardi55, bjonnh, brian, cls, don, donald,
+  eeemsi, f8l, fernandotcl, isolnchip, julien, motif, mw, mxf, phnom, pl,
+  pnutzh4x0r, raphael, sardemff7, stfn, thomasba, xeen
+
+-- Michael Stapelberg, 2011-11-11