Fix D3D11 render target blending issues

The alpha source and destination blend values were always being set to
one and zero, when they should have been set to the same as the color
values.  This caused the alpha of the source texture to always overwrite
the alpha of the destination texture, rather than apply the blend
function upon it.  Needless to say that it seriously screwed up the
render target if you rendered something with alpha on it.

Thanks to paibox for pointing this issue out and yelling at me to fix
it.  I apologize for not getting to this sooner.
Improve FLV output logging

Log when the FLV file output has started and when it has finished.
Use the correct logging name for FLV outputs
Alert user when using existing source name.
Merge pull request #234 from fryshorts/v4l2-input

Make input selectable in v4l2 plugin.
Merge pull request #235 from Socapex/master

Alert user when using existing source name.
Update crowdin url for translator instructions

crowdin moved from .net to .com
Merge pull request #242 from Gol-D-Ace/master

Update crowdin url for translator instructions
Fix Remove Dialog

Remove failed test and add other Messagebox to correct Text with Language support

Add Title again -,-
Merge Freetype text plugin
Add font property

Adds the following function:
------------------------------
obs_properties_add_font

This function creates a 'font' property to allow selection of a system
font.  Implementation by the UI should treat the setting as an obs_data
sub-object with four sub-items:
 - face:   face name (string)
 - style:  style name (string)
 - size:   size (integer)
 - flags:  font flags (integer)

'flags' can be any combination of the following values:
 - OBS_FONT_BOLD
 - OBS_FONT_ITALIC
 - OBS_FONT_UNDERLINE
 - OBS_FONT_STRIKEOUT
Add font property to properties widget

Displays the full name of the font in the font's designated settings,
with a "Select Font" button which brings up a font chooser dialog.
Merge pull request #240 from jkoan/master

Fix Remove Dialog
Fix cursor position in xshm plugin

By premultiplying the cursor translation the cursor is positioned
relative, and thus correctly, when the source has transformations
applied to it.
Merge pull request #247 from fryshorts/xshm-input

Fix cursor position in xshm plugin
Add system font lookup for mac/windows

This changes the font plugin from using a font file to using a specific
installed system font, which is searched for on each specific system and
associated with the font file.  It now uses a font property instead of a
path property, and font size has been removed because the font property
now handles that.

When the module is first loaded, it will build up a list of system fonts
in order to be usable by Freetype.  It was quite painful to program this
because font files can contain multiple localized versions of their face
names, and then there was the issue where windows likes to mangle
custom style types to the font name.  Regardless, it all seems to have
worked out pretty well.

Minor issues:
- Truetype/Opentype fonts sometimes do not automatically have
  italic and/or bold styles available, it seems that the system applies
  transformations manually in those cases.  We don't do this yet,
  however, so right now a user might select a font with italic/bold
  only to discover that italic/bold doesn't always work.  Not entirely
  sure what to do about this yet.  There's probably a freetype function
  to do something like that somehow,

This also requires that iconv be used for non-windows systems to be able
to look up localized font names within font files.  Windows will use
the win32 API and code page IDs to translate font names.
Merge pull request #243 from jp9000/font-test-mac

Merge freetype text plugin
Fix the cmake code for text-freetype2

it is now possible to build text-freetype2 on linux if you comment out a return() otherwise there would have been an error
Also i made the word iconv in find_package lower case, to match the APPLE cmake code
Merge pull request #248 from benklett/cmake-fixes

Fix the cmake code for text-freetype2
Fix double invocation of install_obs_plugin in every single plugin