Please add process for this tool.

[rahulgy]

I am new for concrete5. I want to upgrade my old c5 website to new version of c5. There is no support for old version. So i think i will migrate data and use for new version. I have downloaded your plugin but i am new c5 person. So please let me know after use this tool how i use in latest version on C5. Please guide me.

My current website c5 version is : 5.6.3.2
Want to upgrade latest version : 5.8.x.x

Please add Read.md for this package.

Thanks