Increase warning level for MSVC
Merge pull request #126 from BtbN/more_warnings

Increase warning level for MSVC
Remove 'rebuild' variable from vertexbuffer_flush

This variable is currently somewhat pointless, I was originally going to
use it to tell the graphics subsystem to completely rebuild the internal
vertex buffers, but it would be bad/inefficient to allow that
functionality.
Remove unused graphics subsystem functions

These functions were mostly related to being able to set true fullscreen
mode -- however, this has no place for our purposes, and these functions
were just sitting empty and unused, so they should be removed.

Besides, fullscreen mode only applies to the windows operating system.
d3d11:  Fix a number of warnings
UI:  Fix 'unused param' warnings in windows code
Mark unused lambda parameter
UI:  Fix a few more warnings
DShow:  Comment unused functions until needed
Fix 'potentially uninitialized variable' warnings
Mark WinMain parameters as unused
Fix 'multiple copy constructors' warning
Fix export for obs_property_list_item_remove
Fix DStr move constructor

Previously dstr_move would try to free the uninitialized value in
DStr::str::array
Add DStr move assignment operator
Add API for setting/getting current locale

This API is used to set the current locale for libobs, which it will set
for all modules when a module is loaded or specifically when the locale
is manually changed.
Remove 'locale' from properties

Having the value stored here is somewhat pointless, so this is one step
in fixing the locale handling.  Locale should be handled by the modules
themselves with their own loaded locale lookup information.
Remove 'locale' parameter from all callbacks

The locale parameter was a mistake, because it puts extra needless
burden upon the module developer to have to handle this variable for
each and every single callback function.  The parameter is being removed
in favor of a single centralized module callback function that
specifically updates locale information for a module only when needed.
Add module callbacks for loading locale data

The module callback obs_module_set_locale will be called after loading
the module, and any time the locale is manually changed via core API.

When this function is called, the module is expected to load new text
lookup values for all the text it uses based upon the current locale.
Merge pull request #124 from jp9000/new-locale-handling

Update to new module locale API