fix vignette title, add fix_meta.sh to fix link to og:image in pkgdown

Author: mountainMath

.Rbuildignore

@@ -14,3 +14,4 @@ vignettes/retrieving_cansim_vectors.Rmd
 R/hex_sticker.R
 images
 images/*
+fix_meta.sh

CRAN-RELEASE

@@ -1,2 +1,2 @@
-This package was submitted to CRAN on 2019-07-15.
-Once it is accepted, delete this file and tag the release (commit df3e1a47e2).
+This package was submitted to CRAN on 2019-07-17.
+Once it is accepted, delete this file and tag the release (commit 619b9ab0ca).

R/cansim_tables_list.R

@@ -109,7 +109,7 @@ list_cansim_tables <- function(refresh=FALSE){
   directory <- getOption("cansim.cache_path")
   #if (is.null(directory)) directory <- getOption("cache_path") # legacy
   path <- file.path(directory,"cansim_table_list.Rda")
-  if (is.null(directory) || (!refresh && !exists(path))) {
+  if (is.null(directory) || (!refresh && !file.exists(path))) {
     result=cansim_table_list
     age=(Sys.Date()-attr(result,"date")) %>% as.integer
     if (age>30) {