Use .git/info/exclude instead of multiple .gitignore files

[ocean90]

As mentioned in the todo for wme_create_gitignore():

meta-environment/helper-functions.sh

Lines 34 to 47 in 09ffd2c

	# Add entries to a .gitignore file
	#
	# todo use .git/info/exclude instead, that's more appropriate for this situation
	#
	# $1 - the site's web root
	function wme_create_gitignore {
	# Ignore the .gitignore file itself
	echo "/.gitignore" >> $1/.gitignore
	for i in "${IGNORED_FILES[@]}"
	do :
	echo "$i" >> $1/.gitignore
	done
	}