Fixed database duplication issue

When the database was already created, we weren’t checking for whether it exists before
trying to create it again
Variable hight kunyomi

Made the kunyomi label height vary depending on how much
text there is to display and how many lines the text takes up
Bolded titles

The “english”, “kunyomi”, “hiragana”, etc titles are now bold
Level 5 to N5

The typical level indicator is not level but the letter N
None

Using None to indicate there’s no kunyomi for a kanji. Previously
it was just blank
Images

Added images needed for app store submission