remove duplicate signing

fix publish configuration

wildcard patterns are not supported on windows

add scoverage tasks to the verification group

clear dependencies from published plugin pom

bump plugin-publish-plugin to 0.9.10

attempt to make Travis use the Gradle Wrapper rather than the bundled…

… gradle

Issue 55 - Scala compilation removes Java classes compiled previously

publish to gradle plugin repository

include scoverage in the main sourceset's runtime dependencies