fixing gallery detection by making it case insensitive

# fixing gallery detection by making it case insensitive

## test

before the patch this code create a new gallery called "Åäö" every time

	python3 smugline.py upload åäö --from=/c/file/txt/program/smugline/test --api-key='' --email='' --password=''
	
	unlisted album Åäö created. URL: http://user.smugmug.com/Other/Åäö-2/n-mHM6k