More flexible memory manager (#307)

* Keep track mapped buffers with fixed offsets

* Started rewriting the memory manager

* Initial support for MapPhysicalMemory and UnmapPhysicalMemory, other tweaks

* MapPhysicalMemory/UnmapPhysicalMemory support, other tweaks

* Rebased

* Optimize the map/unmap physical memory svcs

* Integrate shared font support

* Fix address space reserve alignment

* Some fixes related to gpu memory mapping

* Some cleanup

* Only try uploading const buffers that are really used

* Check if memory region is contiguous

* Rebased

* Add missing count increment on IsRegionModified

* Check for reads/writes outside of the address space, optimize translation with a tail call

Ryujinx.HLE/OsHle/Handles/KTransferMemory.cs

@@ -0,0 +1,14 @@
+namespace Ryujinx.HLE.OsHle.Handles
+{
+    class KTransferMemory
+    {
+        public long Position { get; private set; }
+        public long Size     { get; private set; }
+
+        public KTransferMemory(long Position, long Size)
+        {
+            this.Position = Position;
+            this.Size     = Size;
+        }
+    }
+}