Revert "The sonatype-oss-release is implicitly active on release"

This reverts commit ca2fbd21fce377b1f563f3194668accab12fe2d2.
Version 0-preview3
Preparing for 0-preview4
Merge remote-tracking branch 'origin/master'
Golo 0-preview4

Explanation note: 0-preview3 was short-lived because I missed a local Git branch merge again
upstream changes. Because artefacts had already been pushed to Maven Central, there was no easy way
back, hence... 2 releases in a single evening :-)
Next development version
Evaluation environment for dynamic code loading
Imports support
Blank line
Error case
Specify arguments to dynamically loaded functions
Run with a map context
function is a keyword, let's use func instead
Another test
Animal sniffer integration

This plugin checks against Java 7 APIs in the code.
Plugin version as a property
Do not escape in multi-line strings
Rake task to deploy snapshots
Merge branch 'master' into wip/dynamic-evaluation
Advices on dynamic object method definition

Closes #39