[TASK] change fileset and add comments
[BUGFIX] change phpdocumentor version to 2.6.*

becasue of a bug with composer in phpdocumentor 2.7.* we will go back to 2.6.*
Merge pull request #145 from NeoBlack/feature/optimizePhingBuildXml

[BUGFIX][TASK] Optimize phing build.xml file and process