Added javadoc badge

Author: kaifox

README.asciidoc

@@ -5,6 +5,9 @@ image:https://travis-ci.org/tensorics/tensorics-core.svg?branch=master["Travis-C
 image:https://img.shields.io/github/license/tensorics/tensorics-core.svg[]
 image:https://codecov.io/gh/tensorics/tensorics-core/branch/master/graph/badge.svg["codecov", link="https://codecov.io/gh/tensorics/tensorics-core"]
 image:https://api.codacy.com/project/badge/Grade/b830f8eafc0441199d126967bd87d08c["Codacy code quality", link="https://www.codacy.com/app/tensorics/tensorics-core?utm_source=github.com&utm_medium=referral&utm_content=tensorics/tensorics-core&utm_campaign=Badge_Grade"]
+image:http://javadoc.io/badge/org.tensorics/tensorics-core.svg?color=blue["Javadocs",link="http://javadoc.io/doc/org.tensorics/tensorics-core"]
+
+
 
 Tensorics is a java framework which uses a tensor as a central object. A tensor represents a set of values placed in an N-dimensional space. Wherever you are tempted to use maps of maps, a tensor might be a good choice ;-) Tensorics provides methods to create, transform and performing calculations with those tensors.