Update description to reflect submission date to CRAN.

DESCRIPTION

@@ -12,7 +12,7 @@ Authors@R: c(person("Lauren", "Hallett", email="lauren.m.hallett@gmail.com", rol
     person("Scott L.", "Collins", email="scollins@sevilleta.unm.edu", role=c("aut")),
     person("Corinna", "Gries", email="cgries@wisc.edu", role=c("aut")),
     person("Matthew B.", "Jones", email="jones@nceas.ucsb.edu", role=c("aut", "cre")))
-Date: 2018-06-07
+Date: 2018-06-11
 Description: Univariate and multivariate temporal and spatial diversity indices, 
     rank abundance curves, and community stability metrics. The functions 
     implement metrics that are either explicitly temporal and include the