Modernize C++ usage (#144)

* Stratosphere: Use modern C++ idioms in some places

* algorithms like std::for_each are used instead of raw loops

* Stratosphere: Replace more raw loops with algorithms

* Stratosphere: Add a utility predicate function to test for equality with a reference element

This can be used to rewrite some common raw loops using algorithms instead

* fs.mitm: Use variant

* fs.mitm: Use enum class

* fs.mitm: Turn RomFSSourceInfo::Cleanup into a destructor

This obsoletes the need for a custom deleter in other places

* fs.mitm: Use enum class some more

* fs.mitm: Use unique_ptr

* fs.mitm: Simplify initialization

* Stratosphere: Simplify initialization

* fs.mitm: Use unique_ptr (fix memory leak along the way)

The previous code was using "delete" rather than "delete[]"

* fs.mitm: Use vector::emplace_back rather than push_back

emplace_back constructs elements in-place, hence avoiding a redundant element copy.

* Stratosphere: Replace more raw loops with algorithms

* Stratosphere: Use unique_ptr

* fs.mitm: Replace more raw loops with algorithms

* Stratosphere: Prefer move-construction over copy-construction when moving sink parameters around

stratosphere/loader/source/ldr_main.cpp

@@ -93,7 +93,7 @@ int main(int argc, char **argv)
     consoleDebugInit(debugDevice_SVC);
         
     /* TODO: What's a good timeout value to use here? */
-    WaitableManager *server_manager = new WaitableManager(U64_MAX);
+    auto server_manager = std::make_unique<WaitableManager>(U64_MAX);
     
     /* Add services to manager. */
     server_manager->add_waitable(new ServiceServer<ProcessManagerService>("ldr:pm", 1));
@@ -107,8 +107,6 @@ int main(int argc, char **argv)
     /* Loop forever, servicing our services. */
     server_manager->process();
     
-    /* Cleanup. */
-    delete server_manager;
 	return 0;
 }