* make Java imports overridable * fix for other dateLibraries * complete core fix * adapt test - step 1/2 * add unit test * adapt test - step 2/2 * remove accidentally added file * final small clean-up
* add echo tests with java native client * fix echo server * fix github * add npm install * update samples * add license header * update smaples * add test for array of string * fix java native respone type casting * better code format * add license header