Set default encoding of main/resources source folder to UTF-8.

https://github.com/pccampos/pivot4j/commit/a9581b9bfcf890aa393fb082dd1fabc58adee3c8#commitcomment-3975961
Always use en_US locale when running unit tests.

https://github.com/pccampos/pivot4j/commit/91b1bb71b35a931a460bccf596de6e96dbbf7b76
Fix to display a proper message when there's no data available.

(Regression from #53)
Update Brazilian Portuguese translation.

- Contributed by Maiara Lemos of IT4Biz Team(http://www.it4biz.com.br).
Update release note and screenshots for the 0.8 release.
Update POM and Eclipse settings for the 0.8 release.

- Update Pivot4J version number to 0.8.
- Update version number of Pentaho related dependencies to 5.0.0.
Revert back to 0.8-SNAPSHOT version for release.
[maven-release-plugin] prepare release pivot4j-0.8
[maven-release-plugin] prepare for next development iteration
Fix download link & POM reference to the pivot4j-core project.
Fix database deployment path.
Add version.xml for Pentaho Marketplace integration.
Merge remote-tracking branch 'upstream/master'