Add VS 2017 compatibility for building in Appveyor

* add travis-ci badge

* vs2017 compatibility

* add appveyor

* fix appveyor

* revert sln

* fix win64 gdirposx

* fix tab

* version bump

* cosmetic

goldlib/gall/gdirposx.cpp

@@ -126,7 +126,7 @@ void gposixdir::cd(const char *name, bool relative)
     else
         ndirname += "/*";
     struct _finddata_t de;
-    long d = _findfirst(ndirname.c_str(), &de);
+    intptr_t d = _findfirst(ndirname.c_str(), &de);
     if(d == -1) {
         if(is_dir(dirname))
             ok = true;

goldlib/gall/gstrutil.cpp

@@ -31,7 +31,7 @@
 // -------------------------------------------------------------------
 // snprintf() and vsnprintf()
 
-#if  defined(_MSC_VER)
+#if  defined(_MSC_VER) && _MSC_VER<1900
 /* It is need a workaround for implementation "speciality" in snprintf() and vsnprintf() from Microsoft. */
 int snprintf( char *buffer, size_t sizeOfBuffer, const char *format, ... )
 {

goldlib/gall/memleak.h

@@ -26,7 +26,7 @@
 #endif
 
 // Only MS VC++ 5 to 7
-#if (_MSC_VER < 1100) || (_MSC_VER > 1400)
+#if (_MSC_VER < 1100) //|| (_MSC_VER > 1400)
 #error Only MS VC++ 5/6/7/7.1/8 supported. Check if the '_CrtMemBlockHeader' has not changed with this compiler!
 #endif