Don't require mainClassName to be specified in build.gradle as it can be
specified in the robovm.xml.
Upgraded the wrapper to use gradle 2.0. Changed the plugin artifact name to
'robovm-gradle-plugin'.
Changed the plugin artifact name to 'robovm-gradle-plugin'.
Changed version to 1.0.0-alpha-01 and updated to RoboVM version
1.0.0-alpha-01.
Undid version change.
Changed project name to robovm-gradle-plugin.
Added nexus plugin and pom info to publish to Maven Central.
Changed version to 1.0.0-alpha-01 and updated to RoboVM version
1.0.0-alpha-01.
Prepare for next development iteration.
Fixed compilation error after changes to Config.Builder in robovm/.