Fix Jansson dependency importing
Move config include path, so it works for the exported target
Merge pull request #189 from BtbN/cmake_jansson_fix

Fix Jansson dependency importing
Remove Visual Studio projects
Move all data into the subdir it belongs to

Completely removes the build dir in favor of cmake based build layouting
Copy and install PDB files on msvc builds
Add support for build time dependency copying
Update INSTALL instructions for Linux
Remove obsolete FindDirectX.cmake script

There's no need to find DirectX because with VS2013 and mingw it's
already available by default.  Older visual studio versions that didn't
come with DirectX by default are no longer supported anyway.

(Also mingw doesn't currently work at all due to lack of proper headers,
but once they do it'll be available in the same way.  I think.)
Copy all required dependencies (if they exist)

This script will make it so that a windows build will automatically copy
all required dependencies of FFmpeg, x264, and Qt5 to the respective
additional_install_files\exec(32|64) directory.
Improve dependency copying and add debug/release additional install dirs