Added splash support (#2)

Combination of quality of life improvements, bugfixes and splash support:

* unzip_file now works with any file, not just a theme

* Made linked list nodes generic so they work for both splashes and themes

* Fixed bug in previous commit with deleting the zip file once it was unzipped

* All zips in /Splashes/ are now extracted, as with /Themes/

* Splashes are all added to the linked list properly

* Splashes can be installed given a path, but only works on Luma. Undecided as to whether or not I'm going to change this.

TODO:

* Automatically change the luma configuration to enable splash screens

* MAYBE add support for other CFWs (if there's an interest). Maybe set a folder to extract splashes to in some kind of user settings?

source/main.c

@@ -4,47 +4,45 @@
 #include <string.h>
 
 #include "theme.h"
+#include "splashes.h"
 #include "unicode.h"
 
 int main(void)
 {
-	gfxInitDefault();
-	cfguInit();
-	srvInit();	
-	hidInit();
-	fsInit();	
-	ptmSysmInit();
-	consoleInit(GFX_TOP, NULL);
+    gfxInitDefault();
+    cfguInit();
+    srvInit();  
+    hidInit();
+    fsInit();   
+    ptmSysmInit();
+    consoleInit(GFX_TOP, NULL);
 
-	while (aptMainLoop())
-	{
-		hidScanInput();
-		u32 kDown = hidKeysDown();
+    while (aptMainLoop())
+    {
+        hidScanInput();
+        u32 kDown = hidKeysDown();
 
-		if (kDown & KEY_A) {
-			node *first_node = malloc(sizeof(node));
-			first_node->data = NULL;
-			first_node->next = NULL;
-			prepareThemes(first_node);
-			node *current_node = first_node->next;
-    		while (current_node != NULL)
-    		{
-        		printu(current_node->data->title);
-        		current_node = current_node->next;
-    		}
-    		puts("Done!");
-		}
-		if (kDown & KEY_START)
-		{
-			closeThemeArchives();	
-			PTMSYSM_ShutdownAsync(0);
-			ptmSysmExit();
-		}
-		gfxFlushBuffers();
-		gfxSwapBuffers();
-		gspWaitForVBlank();
-	}
+        if (kDown & KEY_A) {
+            node *theme_node = malloc(sizeof(node));
+            theme_node->data = NULL;
+            theme_node->next = NULL;
+            prepareThemes(theme_node);
+            node *splashes_node = malloc(sizeof(node));
+            splashes_node->data = NULL;
+            splashes_node->next = NULL;
+            prepare_splashes(splashes_node);
+        }
+        if (kDown & KEY_START)
+        {
+            closeThemeArchives();   
+            PTMSYSM_ShutdownAsync(0);
+            ptmSysmExit();
+        }
+        gfxFlushBuffers();
+        gfxSwapBuffers();
+        gspWaitForVBlank();
+    }
 
-	gfxExit();
-	return 0;
+    gfxExit();
+    return 0;
 }