Better process implementation (#491)

* Initial implementation of KProcess

* Some improvements to the memory manager, implement back guest stack trace printing

* Better GetInfo implementation, improve checking in some places with information from process capabilities

* Allow the cpu to read/write from the correct memory locations for accesses crossing a page boundary

* Change long -> ulong for address/size on memory related methods to avoid unnecessary casts

* Attempt at implementing ldr:ro with new KProcess

* Allow BSS with size 0 on ldr:ro

* Add checking for memory block slab heap usage, return errors if full, exit gracefully

* Use KMemoryBlockSize const from KMemoryManager

* Allow all methods to read from non-contiguous locations

* Fix for TransactParcelAuto

* Address PR feedback, additionally fix some small issues related to the KIP loader and implement SVCs GetProcessId, GetProcessList, GetSystemInfo, CreatePort and ManageNamedPort

* Fix wrong check for source pages count from page list on MapPhysicalMemory

* Fix some issues with UnloadNro on ldr:ro

Ryujinx.HLE/HOS/Kernel/ThreadSchedState.cs

@@ -1,11 +1,15 @@
 namespace Ryujinx.HLE.HOS.Kernel
 {
-    enum ThreadSchedState : byte
+    enum ThreadSchedState : ushort
     {
-        LowNibbleMask   = 0xf,
-        HighNibbleMask  = 0xf0,
-        ExceptionalMask = 0x70,
-        ForcePauseFlag  = 0x20,
+        LowMask        = 0xf,
+        HighMask       = 0xfff0,
+        ForcePauseMask = 0x70,
+
+        ProcessPauseFlag      = 1 << 4,
+        ThreadPauseFlag       = 1 << 5,
+        ProcessDebugPauseFlag = 1 << 6,
+        KernelInitPauseFlag   = 1 << 8,
 
         None               = 0,
         Paused             = 1,