Autodetect ndk path (#88)
Autodetect ndk path (#88)

* Remove hardcoded enviroment paths for NDK, SDK, nim and SDL

* Now error messages more informative, add NIM_HOME envvar check

* fix paths existing check

* fix paths detecting, change error message, move android-sdk and ndk detecting only for android build

* autodetecting only fro android/ios/ios-sim platforms

yglukhov/nimx,qqquinta/nimx,yglukhov/nimx,rrenderr/nimx,yglukhov/nimx,bogdan-voevoda/nimx,bogdan-voevoda/nimx,rrenderr/nimx,qqquinta/nimx,bogdan-voevoda/nimx,qqquinta/nimx,rrenderr/nimx