Updates

• 29/5:
1. Bit.ly link statistics are available.

• 18/5:
1. Provider settings in setting page is added. Service providers can be shown or hide now.


2. Bugs of collecting feedback is fixed.
• 17/5:
1. Added three providers (LinkShrink,Shorte.st,Adf.ly - Short URL domain must be q.gs)
2. Show a snackbar when settings are saved.