Merge branch 'devel' into issue#5

DESCRIPTION

@@ -19,10 +19,10 @@ Suggests:
     latticeExtra
 Imports:
     Matrix,
-    asserthat
+    assertthat
 License: GPL-2
 LazyData: TRUE
 URL: http://git.leg.ufpr.br/wbonat/mcglm
 BugReports: http://git.leg.ufpr.br/wbonat/mcglm/issues
 Encoding: UTF-8
-VignetteBuilder: knitr
+VignetteBuilder: knitr
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