use libnotify to display notifications

[Killarny]

Use libnotify to display information that would trigger a notification sound (login, logout, user starts transmitting, user joins/leaves channel) or whatever would be shown on the overlay osd.

[x87bliss]

I was really excited by this idea and decided to do some work myself. I'll be submitting a patch after writing this explanation. The patch is made against r832.

First I added the '--disable-notify' option to configure, and added two new source files (/src/manglernotify[.cpp+.h]). Consequently, after applying the patch you must run "autoreconf" to update ./configure and all the makefiles.

Configure will check for libnotify as an optional dependency. You'll need the 'libnotify-dev' package to compile with libnotify support. If this package is not installed, Mangler will still compile just w/o libnotify support.

I made a new class "ManglerNotify?" which is very similar to ManglerG15.

I also added a "getUserName" function to ChannelTree? (the function is a modified copy pasta of getLastTransmit). This function is used to get the name of a user who is disconnecting from the server, but before they are removed from the tree (since you can't use the v3 function to get the user name at this point).

Currently I have the following notifications:
"You connected to: (server lobby name)"
"You disconnected from server"
"(Some user name) connected to server"
"(Some user name) disconnected from server"
"Switched to: (some channel name)"
"Switched to the lobby"
"(Some user name) joined the channel"
"(Some user name) left the channel"

The messages are shown at most 5 at a time, with the newest at the top of the list. Each time an event is added, all events which are at least 10 seconds old are removed from the list.

This patch probably isn't ready to go as it is. I'm hoping whoever does implement this feature can at least use this patch as a starting point (or at least as reference). I will conclude with some things to consider about the patch.

What probably still needs to be done:
1) Adding an option somewhere in the GUI to turn off the notifications (they may annoy some users).
2) Maybe adding options for toggling notification types (i.e. when people join/leave server, channel, etc..)
3) Maybe adding another function in addition to 'addevent' which would list the users currently transmitting. This list should probably be displayed above the list of events.

What needs to be tested:
1) What happens if Mangler is compiled with libnotify, but is run on a PC that doesn't have libnotify installed? Will it cause Mangler to not run?
2) Probably other things.

[x87bliss]

Initial patch for libnotify support

[Haxar]

tl;dr

Just join us on IRC.

irc.freenode.net #mangler

[x87bliss]

Fixed some gobject existence error when closing Mangler if no notifications were shown during Mangler's run.

Fixed when you log onto a server, you no longer get a bunch of "(User name) joined the channel" notifications for each existing user.

Added optional "transmit" notifications. It displays a notification when people start/stop transmitting which lists who is currently transmitting.

Added two options to the "Settings" window. One to enable notifications, and another to enable to "transmit notifications" (currently dependent on notifications being turned on as well).

[x87bliss]

Fix small memory leak on my end; and remove icon to avoid memory leak in Ubuntu