Merge pull request #118 from runcom/curl_dependency_check

Add check for curl dependency

scripts/gvm-check

@@ -39,6 +39,14 @@ Could not find make
 
   linux: apt-get install make
 "
+# Check for curl
+which curl &> /dev/null ||
+	error_message="${error_message}
+Could not find curl
+
+  linux: apt-get install curl
+  mac:   brew install curl
+"
 
 if [ -n "$error_message" ]; then
 	display_warning "$error_message"