bump to version '0.0.2'

Signed-off-by: Sebastien Varrette <sebastien.varrette@uni.lu>
update metadata.json

Signed-off-by: Sebastien Varrette <sebastien.varrette@uni.lu>
upgrade gemfile

Signed-off-by: Sebastien Varrette <sebastien.varrette@uni.lu>
Merge branch 'release/0.0.2' into devel

* release/0.0.2:
  upgrade gemfile
  update metadata.json
  bump to version '0.0.2'