Merge pull request #238 from billhollings/master

Update MoltenVK to version 1.0.20.
diff --git a/Docs/Whats_New.md b/Docs/Whats_New.md
index b31f70b..83969ec 100644
--- a/Docs/Whats_New.md
+++ b/Docs/Whats_New.md
@@ -12,6 +12,19 @@
 For best results, use a Markdown reader.*
 
 
+MoltenVK 1.0.20
+---------------
+
+Released 2018/09/01
+
+- Add support for extensions:
+    - VK_KHR_maintenance1;
+	- VK_KHR_shader_draw_parameters;
+	- VK_KHR_get_physical_device_properties2;
+	- VK_KHR_push_descriptor;
+- Add ability to track and access supported and enabled extensions.
+- Update to latest SPIRV-Cross version.
+
 
 MoltenVK 1.0.19
 ---------------
diff --git a/ExternalRevisions/SPIRV-Cross_repo_revision b/ExternalRevisions/SPIRV-Cross_repo_revision
index 7e060c3..4537bdb 100644
--- a/ExternalRevisions/SPIRV-Cross_repo_revision
+++ b/ExternalRevisions/SPIRV-Cross_repo_revision
@@ -1 +1 @@
-e14bf77b1ac99943aa27c6b9f6446ea2c4a824f7
+6fd66664e8bdadd3f6281aad711f771ef9c24bbe
diff --git a/MoltenVK/MoltenVK/API/vk_mvk_moltenvk.h b/MoltenVK/MoltenVK/API/vk_mvk_moltenvk.h
index 14067b3..22b891e 100644
--- a/MoltenVK/MoltenVK/API/vk_mvk_moltenvk.h
+++ b/MoltenVK/MoltenVK/API/vk_mvk_moltenvk.h
@@ -48,7 +48,7 @@
  */
 #define MVK_VERSION_MAJOR   1
 #define MVK_VERSION_MINOR   0
-#define MVK_VERSION_PATCH   19
+#define MVK_VERSION_PATCH   20
 
 #define MVK_MAKE_VERSION(major, minor, patch)    (((major) * 10000) + ((minor) * 100) + (patch))
 #define MVK_VERSION     MVK_MAKE_VERSION(MVK_VERSION_MAJOR, MVK_VERSION_MINOR, MVK_VERSION_PATCH)