fix url to slackin and spaces

README.md

@@ -1,12 +1,12 @@
 [![Build
 Status](https://travis-ci.org/PyBossa/pybossa.svg?branch=master)](https://travis-ci.org/PyBossa/pybossa) [![Code Health](https://landscape.io/github/PyBossa/pybossa/master/landscape.svg)](https://landscape.io/github/PyBossa/pybossa/master) [![Coverage
-Status](https://img.shields.io/coveralls/PyBossa/pybossa.svg)](https://coveralls.io/r/PyBossa/pybossa?branch=master) 
-[![Documentation](https://readthedocs.org/projects/pybossa/badge/?version=latest)](http://docs.pybossa.com) [![License](http://img.shields.io/badge/license-agplv3-b75bb6.svg)](http://www.gnu.org/licenses/agpl-3.0.html) [![Slack](http://slackin.crowdcrafting.org/badge.svg)](http://slacking.crowdcrafting.org)
+Status](https://img.shields.io/coveralls/PyBossa/pybossa.svg)](https://coveralls.io/r/PyBossa/pybossa?branch=master)
+[![Documentation](https://readthedocs.org/projects/pybossa/badge/?version=latest)](http://docs.pybossa.com) [![License](http://img.shields.io/badge/license-agplv3-b75bb6.svg)](http://www.gnu.org/licenses/agpl-3.0.html) [![Slack](http://slackin.crowdcrafting.org/badge.svg)](http://slackin.crowdcrafting.org)
 
 PyBossa is an open source platform for crowd-sourcing online (volunteer)
 assistance to perform tasks that require human cognition, knowledge or
 intelligence (e.g. image classification, transcription, information location
-etc). 
+etc).
 
 ![Shuttleworth Foundation Funded](http://pybossa.com/assets/img/shuttleworth-funded.png)
 
@@ -58,7 +58,7 @@ It has the instructions to become a contributor.
 
 ## Copyright / License
 
-Copyright 2014 SF Isle of Man Limited. 
+Copyright 2014 SF Isle of Man Limited.
 
 Source Code License: The GNU Affero General Public License, either version 3 of the License
 or (at your option) any later version. (see COPYING file)