Exit with sys.exit instead of application.quit

Sometimes strange things happen when the application exits by closing
the main window. About half the time, I see a segfault in the terminal
output. I've also seen the app live forever after the window closes,
burning 100% cpu on who knows what. Presumably this is because other
parts of the program are still making calls on some Qt objects that are
no longer valid. Since this is only coming up on application exit, the
simple thing to do is to just sys.exit() directly, instead of trying to
clean up Qt.
fbmessenger.desktop
initial icon
Categories=Network
add 'Zoom' setting
Handle multiple monitors properly

The previous way we fetched desktop dimensions only reported the main
screen. This was causing the chat window to snap onto the main screen,
instead of staying where the user put it. Now we fetch the dimensions of
whatever desktop a window is on.  Toasts will now follow the main window
onto secondary screens, which is nice.
Use the system certs file if it's available
suppress the "QFont::setPixelSize: Pixel size <= 0 (0)" warning
adding README.md
chat window alerts

The chat window pops up when a message is received, but it wasn't doing
anything if another message came in while the window was open in the
background. Here we add a simple call to Qt's alert() method. I tried
this in the past and found that it was buggy on Ubuntu, but it seems to
work well enough on Gnome, so I'm adding it back. Might need to refine
this later with platform-specific hacks.
Fixed launcher icon not displayed on Ubuntu
Merge pull request #40 from davidhaller/master

Fixed launcher icon not displayed on Ubuntu
remove 'for Linux' from the Debian description
Stop the fade animation loop when it's over

Previously the toast fade kept looping forever until the window was
shown (after which point it would promptly start looping again). This
was a constant drain on the CPU, but it was low enough that no one
noticed.
Falling back to QSound if Phonon isn't available

With this change, fbmessenger should run unmodified on Mac.
Major cleanup of the root directory

- All packaging scripts moved to the packaging/ directory.
- The "fbmessengerlib" module renamed to just "fbmessenger".
- run.sh added to the root.
- Documentation updated to remove "for Linux" from a bunch of places,
  since we run pretty well on Mac now (need to make a brew formula)
- Bumped VERSION to 0.2.0
fixing a break in the rpm build
fix browser opening when clicking chat gear
Adding a brew formula for OS X and several READMEs
Fix permissions in Debian packages

All files in the package should be owned by root (UID: 0), not by the user who created the package (according to the Debian policies).