This commit applies the 'eclipse' Gradle plugin, such that .classpath,
.project and .settings files can be generated using:
./gradlew eclipse
Once the above is complete, import the project into Eclipse with the
following command:
File->Import->Existing projects into workspace
The .gitignore file has been updated accordingly.
Resolves#222
This partially reverts changes (accidentally) made in fb89f08, restoring
IDEA copyright header configuration files back to their original state
as committed in d5e7b6c.