Change default Windows compiler to MSVS 2015 (VS version 14.0)

tools/utils.py

Index: tools/utils.py
diff --git a/tools/utils.py b/tools/utils.py
index 0611bdd3e7c10cc203e0f8367f9ec91234900bf3..51a3a036d58e6e6bd7102336db2b79ece538e093 100644
--- a/tools/utils.py
+++ b/tools/utils.py
@@ -103,7 +103,7 @@ def GetWindowsRegistryKeyName(name):
 
 # Try to guess Visual Studio location when buiding on Windows.
 def GuessVisualStudioPath():
-  defaultPath = r"C:\Program Files (x86)\Microsoft Visual Studio 12.0\Common7" \
+  defaultPath = r"C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7" \
                 r"\IDE"
   defaultExecutable = "devenv.com"
 
@@ -148,8 +148,8 @@ def GuessVisualStudioPath():
               # Can't find value under the key - continue to the next key.
               continue
             isExpress = executable != 'devenv.com'
-            if not isExpress and subkeyName == '12.0':
-              # Stop search since if we found non-Express VS2013 version
+            if not isExpress and subkeyName == '14.0':
+              # Stop search since if we found non-Express VS2015 version

[zra, 2016/08/05 22:11:16]

strike 'since'

               # installed, which is preferred version.
               return installDir, executable
             else: