Updated project to work again

[DeexCoding]

Updated project, because it did not work, but it came at the cost of compatibility:

• No default paths for ANDROID_NDK, ANDROID_SDK, JAVA_JDK in a.cmd
• Android 6 is the minimum version now

[mmozeiko]

I think you misunderstood why I have those ANDROID_NDK/SDK/JAVA_JDK env variables in bat file.

They were never installed in specific location. You can place them wherever you want. I had then in those locations, so it's easier for me to hardcode them. But the bat file first checks for env variables. So if you have set env variables then it will automatically use them, not hardcoded locations.

So there's no reason to remove them. If you have custom locations, just set env variables and that's it.

Other changes are fine.

[DeexCoding]

Sorry for not updating earlier, exam season was really tough.