Update SBT to latest release versions.
Update sbt-sonatype plugin to latest release versions.
Update ScalaTest to latest release version.
Bump scalamacros compiler plugin version to M2.

2.0.0-M2 is the last that down not break compiletion of current code.
Merge pull request #10 from jpsacha/master

v0.2 as published on Sonatype