Update explore.json

Edit summary: 
* Changed [title] and [message] from "or remix someone elses" to "Or remix one of these examples!"
* Changed [title] and [message] from "Get inspired by examples like these" to "Get inspired by more examples like these"
hmm i do want to change that copy. mind pinging me on irc when available @gesa so i can understand the best way to do this? thank you! :)