Adding support to add objects directly that then are serialized and added to the index
Expect a string or array used as callable
Adding tests for addObject method
Merge remote-tracking branch 'realorigin/master' into serializer_support

Conflicts:
	lib/Elastica/Document.php
	lib/Elastica/Type.php
	test/lib/Elastica/Test/TypeTest.php
fixing test
Deleted unnecessary runtime exception
adding changes to changes.txt
Fixing namespaces in comments
Merge pull request #295 from liip-forks/serializer_support

Adding support to add objects directly that then are serialized and adde...