Merge pull request #427 from brechmos-stsci/readme-fix

Converted the unicode double quote to normal person double quote

Author: Craig Jones

README.md

@@ -6,7 +6,7 @@ For documentation see http://cubeviz.readthedocs.io/en/latest/
 
 ## Release 0.2.0
 
-We are pleased to announce the release of CubeViz, a visualization and analysis tool for data cubes from integral field units (IFUs). This is an early release (v0.2.0) and we would appreciate your feedback.  It is built on top of the “glue” visualization tool.
+We are pleased to announce the release of CubeViz, a visualization and analysis tool for data cubes from integral field units (IFUs). This is an early release (v0.2.0) and we would appreciate your feedback.  It is built on top of the "glue" visualization tool.
 
 To install:
   * Install [Minconda3](https://conda.io/miniconda.html) if it is not on your system