Merge branch 'R_check' into 'master'

i2dash check with rhub

See merge request !22

.Rbuildignore

@@ -8,3 +8,4 @@
 ^_pkgdown\.yml$
 ^docs$
 ^pkgdown$
+^cran-comments\.md$

cran-comments.md

+## Test environments
+- R-hub windows-x86_64-devel (r-devel)
+- R-hub ubuntu-gcc-release (r-release)
+- R-hub fedora-clang-devel (r-devel)
+
+## R CMD check results
+> On windows-x86_64-devel (r-devel), ubuntu-gcc-release (r-release), fedora-clang-devel (r-devel)
+  checking CRAN incoming feasibility ... NOTE
+  Maintainer: 'Arsenij Ustjanzew <arsenij.ustjanzew@mpi-bn.mpg.de>'
+  
+  New submission
+  License components with restrictions and base license permitting such:
+    MIT + file LICENSE
+  
+  File 'LICENSE':
+    MIT License
+    
+    Copyright (c) 2019 Mario Looso, Jens Preussner and Arsenij Ustjanzew
+    
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+    
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+    
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE.
+
+> On windows-x86_64-devel (r-devel), ubuntu-gcc-release (r-release), fedora-clang-devel (r-devel)
+  checking installed package size ... NOTE
+    installed size is  5.6Mb
+    sub-directories of 1Mb or more:
+      doc   5.3Mb
+
+0 errors √ | 0 warnings √ | 2 notes x
+
+* This is a new release.