VS2015 build fixes

- new location of signtool
- silence a nonsensical warning from stl  header
(complain about noexcept() function attribute, if /EHsc is not set)

cmake/install_macros.cmake

@@ -208,6 +208,7 @@ IF(WIN32)
     FIND_PROGRAM(SIGNTOOL_EXECUTABLE signtool 
       PATHS "$ENV{ProgramFiles}/Microsoft SDKs/Windows/v7.0A/bin"
       "$ENV{ProgramFiles}/Windows Kits/8.0/bin/x86"
+      "$ENV{ProgramFiles}/Windows Kits/8.1/bin/x86"
     )
     IF(NOT SIGNTOOL_EXECUTABLE)
       MESSAGE(FATAL_ERROR 

cmake/os/Windows.cmake

@@ -120,7 +120,7 @@ IF(MSVC)
   
   #TODO: update the code and remove the disabled warnings
   SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /wd4800 /wd4805 /wd4996")
-  SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4800 /wd4805 /wd4996 /wd4291 /we4099")
+  SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4800 /wd4805 /wd4996 /wd4291 /wd4577 /we4099")
 
   IF(CMAKE_SIZEOF_VOID_P MATCHES 8)
     # _WIN64 is defined by the compiler itself.