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/fs_mitm/source/fsmitm_main.cpp

@@ -99,8 +99,8 @@ int main(int argc, char **argv)
     }
     
     /* TODO: What's a good timeout value to use here? */
-    MultiThreadedWaitableManager *server_manager = new MultiThreadedWaitableManager(1, U64_MAX, 0x20000);
-    //WaitableManager *server_manager = new WaitableManager(U64_MAX);
+    auto server_manager = std::make_unique<MultiThreadedWaitableManager>(1, U64_MAX, 0x20000);
+    //auto server_manager = std::make_unique<WaitableManager>(U64_MAX);
         
     /* Create fsp-srv mitm. */
     ISession<MitMQueryService<FsMitMService>> *fs_query_srv = NULL;
@@ -110,9 +110,7 @@ int main(int argc, char **argv)
             
     /* Loop forever, servicing our services. */
     server_manager->process();
-    
-    /* Cleanup. */
-    delete server_manager;
-	return 0;
+
+    return 0;
 }