Major update

Changed titlekey dump methodology to no longer need reboot.
Added SD seed dumping.
Reorganized and clarified UI text.
Swapped C++-style I/O for C-style.
Tightened up dependencies.

source/nx/set_ext.c

@@ -0,0 +1,55 @@
+#include "set_ext.h"
+
+#include <switch/arm/atomics.h>
+#include <switch/services/sm.h>
+#include <switch/types.h>
+
+static Service g_setcalSrv;
+static u64 g_refCntCal;
+
+Result setcalInitialize(void) {
+    atomicIncrement64(&g_refCntCal);
+
+    if (serviceIsActive(&g_setcalSrv))
+        return MAKERESULT(Module_Libnx, LibnxError_AlreadyInitialized);
+
+    return smGetService(&g_setcalSrv, "set:cal");
+}
+
+void setcalExit(void) {
+    if (atomicDecrement64(&g_refCntCal) == 0) {
+        serviceClose(&g_setcalSrv);
+    }
+}
+
+Result setcalGetEticketDeviceKey(void *key) {
+    IpcCommand c;
+    ipcInitialize(&c);
+    ipcAddRecvBuffer(&c, key, 0x244, 0);
+
+    struct {
+        u64 magic;
+        u64 cmd_id;
+    } *raw;
+
+    raw = ipcPrepareHeader(&c, sizeof(*raw));
+
+    raw->magic = SFCI_MAGIC;
+    raw->cmd_id = 21;
+
+    Result rc = serviceIpcDispatch(&g_setcalSrv);
+
+    if (R_SUCCEEDED(rc)) {
+        IpcParsedCommand r;
+        ipcParse(&r);
+
+        struct {
+            u64 magic;
+            u64 result;
+        } *resp = r.Raw;
+
+        rc = resp->result;
+    }
+
+    return rc;
+}