Merge branch 'release/version-0.2.7' into develop
[stratio-deep release finish] next snapshot version 0.2.8-SNAPSHOT
fixed NPE in Cell hasCode() function
[stratio-deep release prepare] preparing for version 0.2.8
[Updated ChangeLog.txt for release 0.2.8]
Merge branch 'release/version-0.2.8'