Remove trailing whitespace
Issue #10 Do not require mavenCentralUsername and mavenCentralPassword to be set at configuration time but default to the current users username and an empty password
Issue #7 Correct some errors in README.md
Issue #8 Do not allow to change environmentName or gradleUserName from property files
Fix JavaDoc of class PropertiesPlugin
Issue #9 Make the property names for environmentName and gradleUserName configurable
Output the task name that requires a property