Merge pull request #180 from rvbiljouw/master

Index annotation for generating single-column indexes in DDL
No effective change - code format and javadoc tidy
Merge branch 'master' of github.com:ebean-orm/avaje-ebeanorm
Add LongMaxUpdater, change CQueryPlanStats to use LongMaxUpdater
[maven-release-plugin] prepare release avaje-ebeanorm-4.1.5
[maven-release-plugin] prepare for next development iteration
Fix for #182 Modify pom removing provided scope from slf4j-api dependency