Native windows support using clang (#227)

* Add appveyor file

* Build script

* Remove fPIC for now

* copy as

* set CC and CXX

* Change the order of immintrin.h

* Fix testsuite header

* Move testsuite defs to .c

* Fix appveyor file

* Remove fPIC again and fix strerror_r missing bug

* Remove appveyor script

* cd to blis directory

* Fix sleep implementation

* Add f2c_types_win.h

* Fix f2c compilation

* Remove rdp and rename appveyor.yml

* Remove setenv declaration in test header

* set CPICFLAGS to empty

* Fix another immintrin.h issue

* Escape CFLAGS and LDFLAGS

* Fix more ?mmintrin.h issues

* Build x86_64 in appveyor

* override LIBM LIBPTHREAD AR AS

* override pthreads in configure

* Move windows definitions to bli_winsys.h

* Fix LIBPTHREAD default value

* Build intel64 in appveyor for now

kernels/sandybridge/3/bli_gemm_sandybridge_int_d8x4.c

@@ -32,8 +32,8 @@
 
 */
 
-#include "blis.h"
 #include <immintrin.h> 
+#include "blis.h"
 
 
 #if 0