Update to 3.0-M2 2.11
Delete plugins.sbt
Update build.sbt to rollback compilation against 2.6

But keep upgrade to java openid 0.9.8
and add scala cross version 2.11.2 as in lift 3.0-M2
Update build.sbt to rollback compilation against 2.6

But keep upgrade to java openid 0.9.8
and add scala cross version 2.11.2 as in lift 3.0-M2
Merge pull request #4 from heralight/3.0-M2

Update to 3.0-M2 2.11