Rename parse function

Changed to more descriptive name
Don't return unchanged strings

Return an empty string if parsing failed to make error handling
possible.
Rename resources

We'll need also an date only resource, so rename the current resources
to "datetime...".
Added function for direct formatting of MAL date to translated date
Add another dateformat to parseMALDate

The join date has the format "MMMM dd, yyyy", this is now supported too.
Format functions can return date only
Format dates in ProfileActivity