Minimal misc changes to improve developments (#6)

* Better Fail handling

Change the `fail` block for a more "developer-friendly" environment

* Rename gradlew to gradlew.sh

Renaming the file will enable other developers to easier understand the file tree and not mix it with files like LICENSE and other markdown files

gradlew.bat

@@ -73,10 +73,10 @@ set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
 if "%ERRORLEVEL%"=="0" goto mainEnd
 
 :fail
-rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
-rem the _cmd.exe /c_ return code!
-if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
-exit /b 1
+@rem pause the application before exiting so the user can see the error message and logs
+@rem exit with the errorlevel for further processing
+pause
+exit /b %ERRORLEVEL%
 
 :mainEnd
 if "%OS%"=="Windows_NT" endlocal