Update revdep checks

Author: lionel-

.Rbuildignore

@@ -4,3 +4,4 @@
 ^\.travis\.yml$
 ^cran-comments\.md$
 ^appveyor\.yml$
+^revdep$

revdep/.gitignore

@@ -0,0 +1 @@
+checks/

revdep/README.md

@@ -0,0 +1,61 @@
+# Platform
+
+|field    |value                        |
+|:--------|:----------------------------|
+|version  |R version 3.4.1 (2017-06-30) |
+|os       |macOS Sierra 10.12           |
+|system   |x86_64, darwin15.6.0         |
+|ui       |X11                          |
+|language |(EN)                         |
+|collate  |en_US.UTF-8                  |
+|tz       |Europe/Brussels              |
+|date     |2017-08-03                   |
+
+# Dependencies
+
+|package           |old      |new     |Δ  |
+|:-----------------|:--------|:-------|:--|
+|vdiffr            |0.1.1    |0.1.2   |*  |
+|BH                |1.62.0-1 |NA      |*  |
+|crayon            |1.3.2    |1.3.2   |   |
+|curl              |NA       |2.8.1   |*  |
+|fontBitstreamVera |0.1.1    |0.1.1   |   |
+|fontLiberation    |0.1.0    |0.1.0   |   |
+|fontquiver        |0.2.1    |0.2.1   |   |
+|gdtools           |0.1.4    |0.1.4   |   |
+|git2r             |NA       |0.19.0  |*  |
+|glue              |NA       |1.1.1   |*  |
+|htmltools         |0.3.6    |0.3.6   |   |
+|htmlwidgets       |0.9      |0.9     |   |
+|httpuv            |1.3.5    |1.3.5   |   |
+|lazyeval          |NA       |0.2.0   |*  |
+|praise            |1.0.0    |1.0.0   |   |
+|purrr             |0.2.3    |0.2.2.2 |*  |
+|Rcpp              |0.12.12  |0.12.12 |   |
+|rlang             |0.1.1    |0.1.1   |   |
+|shiny             |1.0.3    |1.0.3   |   |
+|sourcetools       |0.1.6    |0.1.6   |   |
+|svglite           |1.2.0    |1.2.0   |   |
+|testthat          |1.0.2    |1.0.2   |   |
+|tibble            |1.3.3    |1.3.3   |   |
+|withr             |NA       |2.0.0   |*  |
+|xml2              |1.1.1    |1.1.1   |   |
+|xtable            |1.8-2    |1.8-2   |   |
+
+# Revdeps
+
+## Broken (0)
+
+|package |version |error |warning |note |
+|:-------|:-------|:-----|:-------|:----|
+
+## All (5)
+
+|package       |version |error |warning |note |
+|:-------------|:-------|:-----|:-------|:----|
+|atlantistools |0.4.2   |      |1       |1    |
+|ggExtra       |0.7     |      |        |1    |
+|ggstance      |0.3     |      |        |1    |
+|viridis       |0.4.0   |      |1       |1    |
+|visdat        |0.1.0   |-1    |        |     |
+