Move enumerate_instance_version to Entry

Also adds `EntryV1_1` trait

# Conflicts:
#	ash/src/version.rs

ash/src/entry.rs

@@ -170,3 +170,17 @@ impl<V: FunctionPointers> Entry<V> {
         })
     }
 }
+
+#[allow(non_camel_case_types)]
+pub trait EntryV1_1: EntryV1_0 {
+    fn fp_v1_1(&self) -> &vk::EntryFnV1_1;
+
+    unsafe fn enumerate_instance_version(&self) -> VkResult<vk::uint32_t> {
+        let mut api_version = mem::uninitialized();
+        let err_code = self.fp_v1_1().enumerate_instance_version(&mut api_version);
+        match err_code {
+            vk::Result::SUCCESS => Ok(api_version),
+            _ => Err(err_code),
+        }
+    }
+}

ash/src/instance.rs

@@ -86,15 +86,6 @@ impl<V: FunctionPointers> Instance<V> {
 pub trait InstanceV1_1: InstanceV1_0 {
     fn fp_v1_1(&self) -> &vk::InstanceFnV1_1;
 
-    unsafe fn enumerate_instance_version(&self) -> VkResult<vk::uint32_t> {
-        let mut api_version = mem::uninitialized();
-        let err_code = self.fp_v1_1().enumerate_instance_version(&mut api_version);
-        match err_code {
-            vk::Result::SUCCESS => Ok(api_version),
-            _ => Err(err_code),
-        }
-    }
-
     fn enumerate_physical_device_groups(&self) -> VkResult<Vec<vk::PhysicalDeviceGroupProperties>> {
         unsafe {
             let mut group_count = mem::uninitialized();

ash/src/version.rs

@@ -1,5 +1,5 @@
 pub use device::{DeviceV1_0, DeviceV1_1};
-pub use entry::EntryV1_0;
+pub use entry::{EntryV1_0, EntryV1_1};
 pub use instance::{InstanceV1_0, InstanceV1_1};
 use std::mem;
 use vk;

generator/src/lib.rs

@@ -540,7 +540,8 @@ impl CommandExt for vkxml::Command {
             "vkGetInstanceProcAddr" => FunctionType::Static,
             "vkCreateInstance"
             | "vkEnumerateInstanceLayerProperties"
-            | "vkEnumerateInstanceExtensionProperties" => FunctionType::Entry,
+            | "vkEnumerateInstanceExtensionProperties"
+            | "vkEnumerateInstanceVersion" => FunctionType::Entry,
             // This is actually not a device level function
             "vkGetDeviceProcAddr" => FunctionType::Instance,
             _ => {