cmake: Improve Visual Studio 2015 support

Add VS 2015 detection.

Add scripts for building libusb with VS2013/2015 (in a Git Shell).

Check MS64/dll paths for libusb, following the official binary
release file structure.

Author: xlz

cmake_modules/FindGLFW3.cmake

@@ -39,8 +39,12 @@ IF(MINGW)
   SET(_SUFFIX lib-mingw)
 ELSEIF(MSVC11)
   SET(_SUFFIX lib-vc2012)
-ELSEIF(MSVC)
+ELSEIF(MSVC12)
   SET(_SUFFIX lib-vc2013)
+ELSEIF(MSVC14)
+  SET(_SUFFIX lib-vc2015)
+ELSEIF(MSVC)
+  SET(_SUFFIX lib-vc2012)
 ENDIF()
 
 FIND_LIBRARY(GLFW3_LIBRARIES

cmake_modules/FindLibUSB.cmake

@@ -35,6 +35,7 @@ FIND_PATH(LibUSB_INCLUDE_DIRS
   PATH_SUFFIXES
     include
     libusb
+    include/libusb-1.0
 )
 
 FIND_LIBRARY(LibUSB_LIBRARIES
@@ -49,6 +50,7 @@ FIND_LIBRARY(LibUSB_LIBRARIES
     Win32/Release/dll
     Win32/Debug/dll
     MS64
+    MS64/dll
 )
 
 INCLUDE(FindPackageHandleStandardArgs)

depends/install_libusb_vs2013.cmd

@@ -0,0 +1,21 @@
+rem This can only be run in a Git Shell or similar environments
+rem with access to git.exe and msbuild.exe.
+
+rmdir /s /q libusb_src libusb
+
+git clone https://github.com/libusb/libusb.git libusb_src || exit /b
+cd libusb_src
+
+git remote add joshblake https://github.com/JoshBlake/libusbx.git
+git fetch joshblake || exit /b
+git merge joshblake/winiso
+
+set CONFIG=Release
+msbuild msvc\libusb_dll_2013.vcxproj /p:Platform=x64 /p:Configuration=%CONFIG% /target:Rebuild
+
+mkdir ..\libusb\include\libusb-1.0
+copy libusb\libusb.h ..\libusb\include\libusb-1.0
+mkdir ..\libusb\MS64\dll
+copy x64\%CONFIG%\dll\libusb-1.0.lib ..\libusb\MS64\dll
+copy x64\%CONFIG%\dll\libusb-1.0.dll ..\libusb\MS64\dll
+copy x64\%CONFIG%\dll\libusb-1.0.pdb ..\libusb\MS64\dll

depends/install_libusb_vs2015.cmd

@@ -0,0 +1,23 @@
+rem This can only be run in a Git Shell or similar environments
+rem with access to git.exe and msbuild.exe.
+
+rmdir /s /q libusb_src libusb
+
+git clone https://github.com/libusb/libusb.git libusb_src || exit /b
+cd libusb_src
+
+git remote add joshblake https://github.com/JoshBlake/libusbx.git
+git fetch joshblake || exit /b
+git merge joshblake/winiso
+git fetch origin pull/83/head:pr83 || exit /b
+git merge pr83
+
+set CONFIG=Release
+msbuild msvc\libusb_dll_2015.vcxproj /p:Platform=x64 /p:Configuration=%CONFIG% /target:Rebuild
+
+mkdir ..\libusb\include\libusb-1.0
+copy libusb\libusb.h ..\libusb\include\libusb-1.0
+mkdir ..\libusb\MS64\dll
+copy x64\%CONFIG%\dll\libusb-1.0.lib ..\libusb\MS64\dll
+copy x64\%CONFIG%\dll\libusb-1.0.dll ..\libusb\MS64\dll
+copy x64\%CONFIG%\dll\libusb-1.0.pdb ..\libusb\MS64\dll