README: fix location of Gitter badge

Author: ctrueden

README.md

@@ -1,10 +1,8 @@
 [![](http://jenkins.imagej.net/job/SciJava-common/lastBuild/badge/icon)](http://jenkins.imagej.net/job/SciJava-common/)
+[![Join the chat at https://gitter.im/scijava/scijava-common](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/scijava/scijava-common?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
 SciJava Common is a common library for SciJava software. It provides a
 plugin framework, with an extensible mechanism for service discovery, backed
 by its own annotation processor, so that plugins can be loaded dynamically.
 It is used by both [ImageJ](https://github.com/imagej/imagej) and
 [SCIFIO](https://github.com/scifio/scifio).
-
-
-[![Join the chat at https://gitter.im/scijava/scijava-common](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/scijava/scijava-common?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)