Add normalize

add and call normalize
Merge pull request #47 from rnbdsh/patch-1

Add normalize
update screenshots
add en screenshots
update screenshots
fix imports
change exception handling
move getNameFromMeal

move getNameFromMeal logic from MensaMenu back to Parser
fix time parsing for exams
extract and move some ui logic
stretch tabs if necessary

close #36
commit mail fix for JSONMenuLoader

thx to @rnbdsh
Merge pull request #48 from marunjar/dev

merge dev branch