Add sticker popup
Add send sticker message
Add ability to select sticker pack and show stickers for pack with scroll
1. Sticker history
2. Install sticker packs
3. Sticker market
1. Sticker packs are installed on app start up until installation of sticker pack functionality is added
2. Optimisations such as preloading images to be done so that sticker images are not downloaded each time.
emizzle