incremented minor version to 2.1.0-SNAPSHOT and updated dependencies

Upgrade to Scala 2.10 (GitHub ticket #9)
switched from maven-scala-plugin to scala-maven-plugin

Upgrade to Scala 2.10 (GitHub ticket #9)
enabled deprecation and feature warnings

Upgrade to Scala 2.10 (GitHub ticket #9)
explicitly enabled implicits

Upgrade to Scala 2.10 (GitHub ticket #9)
deprecated 'then' methods since 'then' is now a keyword

Upgrade to Scala 2.10 (GitHub ticket #9)
enabled implicits and postfixOps in compiler options instead of source code

Upgrade to Scala 2.10 (GitHub ticket #9)
cleaned up API inconsistencies

Upgrade to Scala 2.10 (GitHub ticket #9)