Corrected functions dealing with StructureChains. (#253)

+ adjusted readme.md accordingly
+ added (a first!) test project

README.md

@@ -191,15 +191,22 @@ vk::StructureChain<vk::MemoryAllocateInfo, vk::MemoryDedicatedAllocateInfo> c =
 };
 ```
 
-Sometimes the user has to pass a preallocated structure chain to query information. In those cases the corresponding query functions are variadic templates and do accept a structure chain to construct the return value:
+Sometimes the user has to pass a preallocated structure chain to query information. For those cases there are two corresponding getter functions. One with a variadic template generating a structure chain of at least two elements to construct the return value:
 
 ```
-// Query vk::MemoryRequirements2KHR and vk::MemoryDedicatedRequirementsKHR when calling Device::getBufferMemoryRequirements2KHR:
+// Query vk::MemoryRequirements2HR and vk::MemoryDedicatedRequirementsKHR when calling Device::getBufferMemoryRequirements2KHR:
 auto result = device.getBufferMemoryRequirements2KHR<vk::MemoryRequirements2KHR, vk::MemoryDedicatedRequirementsKHR>({});
 vk::MemoryRequirements2KHR &memReqs = result.get<vk::MemoryRequirements2KHR>();
 vk::MemoryDedicatedRequirementsKHR &dedMemReqs = result.get<vk::MemoryDedicatedRequirementsKHR>();
 ```
 
+To get just the base structure, without chaining, the other getter function provided does not need a template argument for the structure to get:
+
+```
+// Query just vk::MemoryRequirements2KHR
+vk::MemoryRequirements2KHR memoryRequirements = device.getBufferMemoryRequirements2KHR({});
+```
+
 ### Return values, Error Codes & Exceptions
 
 By default Vulkan-Hpp has exceptions enabled. This means that Vulkan-Hpp checks the return code of each function call which returns a Vk::Result. If Vk::Result is a failure a std::runtime_error will be thrown. Since there is no need to return the error code anymore the C++ bindings can now return the actual desired return value, i.e. a vulkan handle. In those cases ResultValue <SomeType>::type is defined as the returned type.