Improve the English text of the popup message
Improve the English text of the popup message

Changes:
1. Ask to rate, instead of command.
2. Don't repeat "the app", it's redundant. That's what "it" is for.
3. Change "Remind later" which sounds broken to "Later", which is an acceptable short form to "Remind me later", especially given the implied "I don't have time to rate it now, stop bothering me!!!".
kobakei/Android-RateThisApp