changed the methods "getAllAttributesAsString" to return the ID (in case
of an object reference) instead of the MD5 of the object.
Ignore Target and IDEA Directory!!!
Added LangDaniel Configuration
updated save
created HashGenerationTest
Added some tests
Added some tests
Replaced getEntityById with getEntityByObject (class-check)
Changed Project Details in POM-File
Fixed invalid check in clean()
Update README.md
Added some tests
Added cleanWithNotAddedObject() Registry-Test
Added test to check different classes in Registry
Merge remote-tracking branch 'origin/master'

Conflicts:
	src/test/java/at/grueneis/spengergasse/registry/RegistryTest.java
fixed all tests
Merge branch 'master' of https://github.com/daniel-lang/E-Framework
Merge branch 'master' of https://github.com/daniel-lang/E-Framework into daniel-lang-master
changed static to nonstatic
added getInstance
Merge branch 'master' of https://github.com/stuka120/E-Framework