Fix R CMD check warnings/notes in DESCRIPTION

Author: hadley

DESCRIPTION

@@ -1,10 +1,10 @@
-Type: Package
 Package: codecov.R
-Title: A minimal R package including some unit tests
-Description: This package demostrates how "covr" and "codecov.io" can report test coverage on R packages
-Author: Gergely Daróczi <daroczig@rapporter.net>
-Maintainer: Gergely Daróczi <daroczig@rapporter.net>
 Version: 0.1
-Date: 2015-03-14
+Title: A Minimal R Package Including Some Unit Tests
+Description: This package demostrates how "covr" and "codecov.io" can
+    report test coverage on R packages.
+Encoding: UTF-8
+Authors@R:
+    person("Gergely", "Daróczi", , "daroczig@rapporter.net", c("aut", "cre"))
 License: GPL-3
 Suggests: testthat