Add dependency type tp r- packages

This PR adds the `nolink` dependency type to r- package dependencies.
This is needed due to the new dependency types in Spack. A couple of
packages were updated with new versions as well.

var/spack/repos/builtin/packages/r-ggvis/package.py

@@ -38,13 +38,13 @@ class RGgvis(Package):
 
     extends('R')
 
-    depends_on('r-assertthat')
-    depends_on('r-jsonlite')
-    depends_on('r-shiny')
-    depends_on('r-magrittr')
-    depends_on('r-dplyr')
-    depends_on('r-lazyeval')
-    depends_on('r-htmltools')
+    depends_on('r-assertthat', type=nolink)
+    depends_on('r-jsonlite', type=nolink)
+    depends_on('r-shiny', type=nolink)
+    depends_on('r-magrittr', type=nolink)
+    depends_on('r-dplyr', type=nolink)
+    depends_on('r-lazyeval', type=nolink)
+    depends_on('r-htmltools', type=nolink)
 
     def install(self, spec, prefix):
         R('CMD', 'INSTALL', '--library={0}'.format(self.module.r_lib_dir),