More cross platform improvements.

.gitattributes

.gitignore

cordova-app/.gitignore

cordova-app/build.json

cordova-app/build.nix

cordova-app/scripts/androidBeforeBuild.js

cordova-app/www/img

devTools/androidsdk/image/Dockerfile

...ndroidsdk/image/commandlinetools-linux-6609375_latest.zip

devTools/androidsdk/image/cordova/config.xml

devTools/androidsdk/image/cordova/package-lock.json

devTools/androidsdk/image/cordova/package.json

...ols/androidsdk/image/cordova/platforms/android/.gitignore

.../cordova/platforms/android/CordovaLib/AndroidManifest.xml

...k/image/cordova/platforms/android/CordovaLib/build.gradle

...image/cordova/platforms/android/CordovaLib/cordova.gradle

...e/cordova/platforms/android/CordovaLib/project.properties

...ordovaLib/src/org/apache/cordova/AuthenticationToken.java

...ndroid/CordovaLib/src/org/apache/cordova/BuildHelper.java

...id/CordovaLib/src/org/apache/cordova/CallbackContext.java