Merge tag 'v1.0-4'

v1.0-4
Merge tag 'v1.1'

v1.1
Merge branch 'develop'
v1.2
- fix: because later there is a access to the array $object['value'] but the $object array were overwritten with a string
Merge pull request #34 from larseidam/EfZendDb_deleteMatchingStatements

fix falsely overwriting $object array with a string in EfZendDB
Remove debug output commited by mistake
Remove debug output comitted by mistake
apply coding standarts to Store.php
fix reference in getModelOrCreate
add Ping class to Erfurt
some refactoring of Ping class
Add ModelExport, Debug and ExtensionConfiguration actions

- add a constant for ModelExport action to ac class
Merge tag 'v1.2' into develop

v1.2
release v1.3
add clean target
Change ac warn to debug log
Merge branch 'develop' of github.com:AKSW/Erfurt into develop
Enhance performance by accessing model only if needed

- model is only access, when namespaces are not yet fetched, which saves some
  SPARQL queries
Use faster way to add items to array