Removed back ticks from funtion names, changed back ticks to single q…

…uotes around package names.

DESCRIPTION

@@ -6,10 +6,10 @@ Authors@R: c(person("John", "Quensen", email = "quensenj@msu.edu", role = c("aut
            person("Gavin", "Simpson", role = "aut"),
            person("Jari", "Oksanen", role = "aut"))
 Maintainer: John Quensen <quensenj@msu.edu>
-Description: The `vegan` package includes several functions for adding features
-  to ordination plots: `ordiarrows()`,  `ordiellipse()`, `ordihull()`,
-  `ordispider()` and `ordisurf()`. This package adds these same   features to 
-  ordination plots made with `ggplot2`. In addition, `gg_ordibubble()` sizes
+Description: The 'vegan' package includes several functions for adding features
+  to ordination plots: ordiarrows(),  ordiellipse(), ordihull(),
+  ordispider() and ordisurf(). This package adds these same   features to 
+  ordination plots made with 'ggplot2'. In addition, gg_ordibubble() sizes
   points relative to the value of an environmental variable. 
 License: GPL (>= 2)
 Encoding: UTF-8