Update backup and restore code, adb sideload

Fixed a problem with using make_ext4fs by making its lib
a dynamic lib.
Added ADB sideload zip install feature - no way to cancel it yet.
Improve backup and restore code.
diff --git a/twrp-functions.hpp b/twrp-functions.hpp
index 19f8eec..b619239 100644
--- a/twrp-functions.hpp
+++ b/twrp-functions.hpp
@@ -10,13 +10,16 @@
 {
 public:
 	static int Check_MD5(string File);
-	static string Get_Root_Path(string Path);                                // Trims any trailing folders or filenames from the path, also adds a leading / if not present
-	static string Get_Path(string Path);                                     // Trims everything after the last / in the string
-	static string Get_Filename(string Path);                                 // Trims the path off of a filename
+	static string Get_Root_Path(string Path);                                   // Trims any trailing folders or filenames from the path, also adds a leading / if not present
+	static string Get_Path(string Path);                                        // Trims everything after the last / in the string
+	static string Get_Filename(string Path);                                    // Trims the path off of a filename
 
-	static void install_htc_dumlock(void);                                   // Installs HTC Dumlock
-	static void htc_dumlock_restore_original_boot(void);                     // Restores the backup of boot from HTC Dumlock
-	static void htc_dumlock_reflash_recovery_to_boot(void);                  // Reflashes the current recovery to boot
+	static void install_htc_dumlock(void);                                      // Installs HTC Dumlock
+	static void htc_dumlock_restore_original_boot(void);                        // Restores the backup of boot from HTC Dumlock
+	static void htc_dumlock_reflash_recovery_to_boot(void);                     // Reflashes the current recovery to boot
+	static int Recursive_Mkdir(string Path);                                    // Recursively makes the entire path
+	static unsigned long long Get_Folder_Size(string Path, bool Display_Error); // Gets the size of a folder and all of its subfolders using dirent and stat
+	static bool Path_Exists(string Path);                                       // Returns true if the path exists
 
 };