improve vim config + aliases behavior

* disable mouse option in vim (not working well with C/C on mac)
* improve function for getting article publication dates

dot_zsh_functions

@@ -78,5 +78,11 @@ function istherenewissues() {
     echo "$LASTISSUE" > .newjiraissue
 }
 function greppagedate() {
-    curl -sSL "$*" | \grep datetime | \grep -Eo '[[:digit:]]{4}' | head -n1
+    year=$(curl -sSL "$*" | tr '<' '\r' | \egrep -i "date|datetime" -A 1 | \grep -Eo '\b[[:digit:]]{4}\b' | head -n1)
+    yearint=$(($year + 0))
+    currentyear=$(echo `date +"%Y"`)
+    if [[ $yearint -ge 1970 && $yearint -le $currentyear ]]
+    then
+      echo "$yearint"
+    fi
 }