Fix asset crash interleaving with active encoders

Apparently the audio isn't guaranteed to start up past the first video
frame, so it would trigger that assert (which I'm glad I put in).  I
didn't originally have this happen when I was testing because my audio
buffering was not at the default value and didn't trigger it to occur.
A blunder on my part, and once again a fine example of how you should
never make assumptions about possible code path.
Update to 0.6.4
linux-capture: Add X border option to xcomposite

XComposite, which is currently our only capture method for windows,
doesn't handle X border width. This works in a lot of cases but anytime
there's a border, a bug occurs where the lower right is clipped.  This
patch has two goals:

1) To position and size the capture texture correctly in accordance to
the border.

2) Adds a configuration option to allow people to toggle it (which in
most cases will simply do nothing) with a default of not including it.
Fixed 2 minor spelling errors.
Merge pull request #298 from ThoNohT/patch-1

Fixed 2 minor spelling errors.
Fix creating textures from image data with flipping

When the image data is copied into a texture with flipping set to true
each row has to be copied into the (height - row - 1)th row instead of
the row with the same number. Otherwise it will just create an unflipped
copy.
Merge pull request #299 from reboot/fix_creating_flipped_textures

Fix creating textures from image data with flipping
libobs: Replace fmaxf with inline comparison.

This replaces the call to fmaxf with the equivalent inline comparison
which is a bit faster (at least on linux).
Add obs_source_draw helper function

This function simplifies drawing textures for sources in order to help
reduce boilerplate code.  If a source is a custom drawn source, it will
automatically set up the effect to draw the sprite.  If it's not a
custom drawn source, it will simply draw the sprite as per normal.  If
the source uses a specific color matrix, it will also handle that as
well.
Add config_open_string function

This allows opening ini config data from a string.  Before, it was only
possible to load config from a file.
Allow hex numbers to be used in config data

This allows the 0x* format of hexadecimal integers to be used as config
integers.
obs-ffmpeg: If ffaac is used, change cutoff freq

If FFmpeg's experimental aac encoder is used, this changes the cutoff
frequency to better values in order to try to help make up for the
inherent lack of encoder quality a bit.  If FFmpeg is compiled to use
another encoder by default, these settings will not be applied.
text-freetype2: Do not call wcslen in loop expr.

Doing this in the expression will cause it to execute the function every
time the expression is evaluated, which is needless cycles wasted.
Instead, call wcslen before the loops begin.
text-freetype2: Remove null pointer dereference
Merge pull request #300 from fryshorts/audio-perf

libobs: Replace fmaxf with inline comparison.
Merge remote-tracking branch 'upstream/master'