v0.1.11.11 revision of the startup message returned when the package is attached

DESCRIPTION

 Package: airGRteaching
 Type: Package
 Title: Tools to Simplify the Use of the airGR Hydrological Package for Education (Including a Shiny Interface)
-Version: 0.1.11.10
+Version: 0.1.11.11
 Date: 2018-01-29
 Authors@R: c(person("Olivier", "Delaigue", role = c("aut", "cre"), email = "airGR@irstea.fr"), person("Laurent", "Coron", role = c("aut")), person("Pierre", "Brigode", role = c("aut")), person("Guillaume", "Thirel", role = c("ctb")))
 Depends: airGR (>= 1.0.9.43)

R/Utils.R

@@ -3,8 +3,8 @@
 ## =================================================================================
 
 .onAttach <- function(lib, pkg) {
-  packageStartupMessage("\nThe airGRteaching needs the last version of the 'dygraphs' package.\n",
-                        "Please, reinstall it with the following command:\n",
+  packageStartupMessage("\nThe airGRteaching needs the last version of the 'dygraphs' package that is only available on github at the moment.\n",
+                        "Please, make sure at the first use of airGRteaching to install ‘dygraphs’ with the following command:\n",
                         "\tdevtools::install_github(c(\"ramnathv/htmlwidgets\", \"rstudio/dygraphs\"), force = TRUE)")
 }