Merge pull request #6 from levkhomich/master

coveralls.io internal server error handling
Moved location of coveralls-plugin
Restored backwards compatibility
Merge pull request #9 from pjan/master

Moved CoverallsPlugin to enable import from Build.scala projects
Updated Readme with build.scala example
Merge pull request #10 from pjan/master

Updated Readme with build.scala example
Fixed some warnings
Updated project for scoverage package
Updated Specifying Your Repo Token
Merge pull request #14 from iref/master

Updated Specifying Your Repo Token
better handling for coveralls.io 500 response