Updated tests to latest version of ScalaTest.
Cosmetic
Ignore Atlassian plugin XML files.
Fixed Scaladoc
Upgraded PGP and LS plugins. Added sbt-idea plugin.
Updated to SBT 0.13
Updated ScalaTest. Updated Scala version. Updated version.
Added Either enrichment.
Changed copyright.
Test cases for RichEither.
Merged pull request #6, from @jimfulton.
Fixed Issue #4: Invalid result from stats.range() for single value.
Notes on 1.1.5
Version 1.1.5
sbt-ls info for version 1.1.5
Removed crossScalaVersions (not necessary)