WikiProject string should be stripped from hashtag

[dartar]

I noticed that on a few occasions – likely because of some weirdness with the names of templates used on talk pages – the string WikiProject is included in the string, we should probably strip exact matches. See:

• https://twitter.com/wpstubs/status/762449846829592576
• https://twitter.com/wpstubs/status/761938155767533569

[dartar]

...maybe just strip "WikiProject" wherever it occurs, instead of matching the beginning of the string? https://github.com/theopolisme/wpstubs/blob/master/app.js#L73