skip data concatenation for z instruction in collapseRepeated
Merge pull request #163 from silentroach/bugfix-collapseRepeated-z

skip data concatenation for z instruction in collapseRepeated
+ removeTitle plugin, disabled by default #159
Merge pull request #164 from silentroach/feature-remove-title

new plugin: removeTitle (disabled by default, close #159)
do not remove overriden attributes with default values #161
Merge pull request #165 from silentroach/bugfix-remove-inherited-defaults

removeUnknownsAndDefaults: do not remove overriden attributes with default values