Add links for official download sources

I see that this module has been available for download from other sources too, while respecting the license. I don't have anything against this and I'm happy that people got interest in it, but I do want to have a notice about the officially maintained sources just to feel safer.

README.md

@@ -1,6 +1,8 @@
 # isodrive (configfs)
 
-* `apt install build-essential`
+## Building
+
+* `sudo apt install build-essential`
 
 * `git clone https://github.com/nitanmarcel/isodrive`
 
@@ -8,35 +10,34 @@
 
 * `make`
 
-* `make install` (optional)
+* `sudo make install` (optional)
 
-usage:
+## Usage
 
-* `isodrive {iso} {cdrom[0/1]} {readonly[1/0]}`
+Run `su` to be able to access and use the `isodrive` command.
 
-mount
+```
+Usage:
+isodrive [FILE]... [OPTION]...
+Mounts the given FILE as a bootable device using configfs.
+Run without any arguments to unmount any mounted files and display this help message.
 
-* `isodrive /full/path/to/file.iso`
-
-umount
-
-* `isodrive`
-
-mount (as cdrom)
-
-* `isodrive /full/path/to/file.iso 1 1`
-
-mount (as read write)
-
-* `isodrive /full/path/to/file.iso 0 0`
-
-## Termux
-
-* Run `su` before using isodrive command
+Optional arguments:
+-rw		Mounts the file in read write mode.
+-cdrom		Mounts the file as a cdrom.
+-configfs	Forces the app to use configfs.
+-usbgadget	Forces the app to use sysfs.
+```
 
 ## Os Support
 * _Should support almost every bootable OS images, but for those who don't work or need extra steps, are documented in the [WIKI](https://github.com/nitanmarcel/isodrive/wiki)_
 
+## Download
+The only officially maintained versions by me are available on [github releases](https://github.com/nitanmarcel/isodrive-magisk/releases/) and [Magisk-Modules-Alt-Repo](https://github.com/Magisk-Modules-Alt-Repo). I assume no liability for any downloads  originating from unofficial sources.
+
+## Source Code
+* https://github.com/nitanmarcel/isodrive-magisk
+* 
 ## Credits
 
 Inspired by https://github.com/fredldotme/ISODriveUT

magisk-module/module.prop

@@ -1,6 +1,6 @@
 id=isodrive
 name=Isodrive
 author=Marcel Alexandru Nitan
-version=1.0
-versionCode=1
+version=2.1
+versionCode=21
 description=Use your mobile device to boot Linux distributions/ISO files on your PC

native/jni/Android.mk

@@ -8,6 +8,7 @@ LOCAL_MODULE := isodrive
 LOCAL_SRC_FILES := \
 	isodrive/src/util.cpp \
 	isodrive/src/configfsisomanager.cpp \
+	isodrive/src/androidusbisomanager.cpp \
 	isodrive/src/main.cpp
 
 include $(BUILD_EXECUTABLE)