1.0.0

Merged pull requests and fixed issues:

#48 - Windows compatibility
#46 - Add a Gitter chat badge to README.md
#44 - Improve the handling of incorrect coveralls token
#43 - Make the git test more reliable
#41 - Fix various bugs with aggregated projects
#40 - Don't upload multiple payloads
#38 - Updating the readme to specify how to use this plugin with travis-pro (fixes issue #37 - Document the need to add configuration to your build.sbt to enable travis-pro as a service_name)
#35 - Fix for issue #28 (fixes issue #28 - StringIndexOutOfBoundsException when running on Travis CI)
#31 - Update README.md (fixes issue #30 - Can't resolve 1.0.0)
#24 - Correct README.md for build.sbt
#21 - No need to re-run tests if a scoverage.xml exists)
#3 - Option to just upload