Fix cmake policy warning

test is a reserved name.
Add cmake module for finding udev.

This adds a cmake module to find udev/libudev for linux.
Add udev helper library to v4l2 plugin.

This adds a small helper library to the v4l2 plugin that uses udev to
get events for v4l2 devices.
Use udev events in the v4l2 plugin.

This adds code to set up the udev monitoring library and use the events
to detect connects/disconnects of devices.
When the currently used device is disconnected the plugin will stop
recording and clean up, so that the device node is freed up.
On reconnection of the device the plugin will use the event to
automatically start the capture again.
Fix left open file descriptor in v4l2 plugin.
Ignore source deselection until multiple selection is implemented
Merge pull request #282 from BtbN/cmake_mac_fix

Fix cmake policy warning
Merge pull request #284 from fryshorts/v4l2-input

Add udev support to v4l2 plugin.
win-capture: Separate window finding source code

Because other capture methods may end up needing to share this code,
separate the window finding source code to window-helpers.c and
window-helpers.h.

This include a function to fill out a property list with windows, a
function to find a window based upon priority/title/class/exe, and a
function to decode the window title/class/exe strings from a window
setting string.
Update to version 0.6.2
linux-pulseaudio: Fix the default req. buffer len

This changes the the requested buffer length to 25ms.
linux-pulseaudio: Use defaults for pa_buffer_attr

Although these values aren't used in capture mode, set these to the
default values just to be safe.
linux-pulseaudio: Force stereo if unknown layout

This adds a check to change the capture settings to use 2 channels when
a channel number is encountered that would otherwise be interpreted as
SPEAKERS_UNKNOWN.
Update Ubuntu PPA install instructions
Merge pull request #286 from dodgepong/master

Update Ubuntu PPA install instructions
Fix sources context menu "Remove" shortcut for OSX
Add "Remove" shortcut to scenes context menu
Fix "Remove" shortcut (Del) to work for both scenes and sources
Add "Rename" entry to scenes context menu
Disable double click renaming for both scenes and sources