Fixed basic settings window (forgot linux)

The function would fail to compile on linux because the variables didn't
exist
Move basic mode configuration to a separate file

Having everything in global.ini meant that if you wanted different
settings for studio mode, that it would also overwrite it for basic
mode.  This way, the settings for each mode are separate, and you can
use different settings for each mode.
Add a way to get default settings

 - Implement a means of obtaining default settings for an
   input/output/encoder.  obs_source_defaults for example will return
   the default settings for a particular source type.

 - Because C++ doesn't have designated initializers, use functions in
   the WASAPI plugin to register the sources instead.
Use only one widget for preview

Modify the obs_display API so that it always uses an orthographic
projection that is the size of the display, rather than OBS' base size.
Having it do an orthographic projection to OBS' base size was silly
because it meant that everything would be skewed if you wanted to draw
1:1 in the display.  This deoes mean that the callbacks must handle
resizing the images, but it's worth it to ensure 1:1 draw sizes.

As for the preview widget, instead of making some funky widget within
widget that resizes, it's just going to be a widget within the entire
top layout.  Also changed the preview padding color to gray.
Make audio devices save to settings

Also, revamp the settings dialog code and make it use signals and slots
a bit better.
WASAPI: Change some errors messages to warnings

There shouldn't be errors if the actual source has successfully been
created, just warnings.
Activate user-selected audio devices

 - Fix a bug where the initial audio data insertion would cause all
   audio data to unintentionally clear (mixed up < and > operators, damn
   human error)

 - Fixed a potential interdependant lock scenario with channel mutex
   locks and graphics mutex locks.  The main video thread could lock the
   graphics mutex and then while in the graphics mutex could lock the
   channels mutex.  Meanwhile in another thread, the channel mutex could
   get locked, and then the graphics mutex would get locked, causing a
   deadlock.

   The best way to deal with this is to not let mutexes lock within
   other mutexes, but sometimes it's difficult to avoid such as in the
   main video thread.

 - Audio devices should now be functional, and the devices in the audio
   settings can now be changed as desired.
Fix an error and a few warnings

The strings didn't have ending double quotes.  No clue why this didn't
fail in GCC and VC.  Well, VC is horrible but I expected better out of
GCC.
UI: Swap audio slots

Had the audio restart slot connected to things that didn't require a
restart
Add preliminary streaming code for testing

 - Add some temporary streaming code using FFmpeg.  FFmpeg itself is not
   very ideal for streaming; lack of direct control of the sockets and
   no framedrop handling means that FFmpeg is definitely not something
   you want to use without wrapper code.  I'd prefer writing my own
   network framework in this particular case just because you give away
   so much control of the network interface.  Wasted an entire day
   trying to go through FFmpeg issues.

   There's just no way FFmpeg should be used for real streaming (at
   least without being patched or submitting some sort of patch, but I'm
   sort of feeling "meh" on that idea)

   I had to end up writing multiple threads just to handle both
   connecting and writing, because av_interleaved_write_frame blocks
   every call, stalling the main encoder thread, and thus also stalling
   draw signals.

 - Add some temporary user interface for streaming settings.  This is
   just temporary for the time being.  It's in the outputs section of
   the basic-mode settings

 - Make it so that dynamic arrays do not free all their data when the
   size just happens to be reduced to 0.  This prevents constant
   reallocation when an array keeps going from 1 item to 0 items.  Also,
   it was bad to become dependent upon that functionality.  You must now
   always explicitly call "free" on it to ensure the data is free, and
   that's how it should be.  Implicit functionality can lead to
   confusion and maintainability issues.
Fix a few warnings
Ensure names are valid

Ensure that a source has a valid name.  Duplicates aren't a big deal
internally, but sources without a name are probably something that
should be avoided.  Made is so that if a source is programmatically
created without a name, it's assigned an index based name.

In the main basic-mode window, made it check to make sure the name was
valid as well.
Ensure URL and key are valid if trying to stream
CoreAudio: fix properties for input/output

Also, check that audio devices are available before setting defaults
Fix minor warning (redundant code)
Allow file names to be used instead of URLs
Fix audio streaming and mac semaphores

...The reason why audio didn't work was because I overwrote the bitrate
values.

As for semaphores, mac doesn't support unnamed semaphores without using
mach semaphores.  So, I just implemented a semaphore wrapper for each
OS.
Fix non-windows event code

And remember to compile on non-windows systems before committing
Fix semaphore mac code and mac plugin

Didn't convert the event names and didn't have the right mac includes
Fix wrong linux function

Used the mac function instead by accident