Update README.md

Updated to include a warning for developers attempting to run this project in the old development environment.

At this stage I do not know what has occurred in Eclipse to make it so non-functional but at no point in the last 6 months have I been able to compile and even open Java projects of any sort in it. Android Studio aka IntelliJ uses the most recent dependency and compilation management systems making it a much more stable alternative with Plug and Play (zero setup) project structure requiring no end user configuration before being compilable.