Added packs twitch, betterttv, betterttv-gifs, overwatch

packs/betterttv-gif/betterttv-gif/README.md

+# betterttv-gif  
+![Preview of betterttv-gif](preview.png)
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packs/betterttv-gif/betterttv-gif/betterttv-gif.json

+{"title":"betterttv-gif","id":"betterttv-gif","stickers":[{"body":"blobDance.gif","info":{"mimetype":"image/gif","h":103,"w":128,"thumbnail_url":"mxc://matrix.org/xAnucldqFYBUMMBJyrWMNsdS"},"msgtype":"m.sticker","url":"mxc://matrix.org/xAnucldqFYBUMMBJyrWMNsdS","id":"betterttv-gif-blobDance.gif"},{"body":"Clap.gif","info":{"mimetype":"image/gif","h":128,"w":99,"thumbnail_url":"mxc://matrix.org/lUVLPGQmqqziFKZqwHTOCmHg"},"msgtype":"m.sticker","url":"mxc://matrix.org/lUVLPGQmqqziFKZqwHTOCmHg","id":"betterttv-gif-Clap.gif"},{"body":"coffinPls.gif","info":{"mimetype":"image/gif","h":109,"w":128,"thumbnail_url":"mxc://matrix.org/OoRHTkdBctPScrTizQwtmVVu"},"msgtype":"m.sticker","url":"mxc://matrix.org/OoRHTkdBctPScrTizQwtmVVu","id":"betterttv-gif-coffinPls.gif"},{"body":"DonaldPls.gif","info":{"mimetype":"image/gif","h":123,"w":128,"thumbnail_url":"mxc://matrix.org/mWRIWpAtgIMhJElAGMPivgRh"},"msgtype":"m.sticker","url":"mxc://matrix.org/mWRIWpAtgIMhJElAGMPivgRh","id":"betterttv-gif-DonaldPls.gif"}]}
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