How to contribute to the project.

Install Gradle 2.14+.
To build in command line: run "gradle build".
To open the project code in IDEA or Eclipse: open "build.gradle" file. Your IDE will create a project from the gradle script.
Please make sure you add unit and/or integration tests when submitting your changes.
Always include description of what your pull request is trying to achieve, why the current API is bad or not sufficient.
Don't forget to document required Redmine version and other limitations & requirements.

Release process

Note: this can only be done by someone who has both "gpg key" to sign artifacts and password to upload to OSS Sonatype repository.

Run "gradle build" to make sure all code is compilable and tests pass.
Run "gradle upload" to upload the artifacts to OSS Sonatype Nexus. This is usually done by a Jenkins "release lib" job.
Open https://oss.sonatype.org/index.html#stagingRepositories (use proper credentials), find "com.taskadapter" group and the required artifact, use "close" button and then "release".
That's it. Once "released", the artifact will be synced from OSS Sonatype Nexus repository to Maven Central in a few hours.
Update CHANGELOG file.