add shortcode with a single party info

[PeterTheOne]

As described by @collentine in Pirate-Parties-International/PPI-rest-api#7:

One example would be someone writing about a pirate party and creating a "country box" that could be added to bottom of articles with some stats.

[PeterTheOne]

[pirate-party id="ppar"]
[pirate-party id="ppat"]
[pirate-party id="ppau"]
[pirate-party id="ppba"]
[pirate-party id="ppbe"]
[pirate-party id="ppbr"]
[pirate-party id="ppby"]
[pirate-party id="ppca"]
[pirate-party id="ppcat"]
[pirate-party id="ppch"]
[pirate-party id="ppcl"]
[pirate-party id="ppcn"]
[pirate-party id="ppco"]
[pirate-party id="ppcy"]
[pirate-party id="ppcz"]
[pirate-party id="ppde"]
[pirate-party id="ppdk"]
[pirate-party id="ppee"]
[pirate-party id="ppes"]
[pirate-party id="ppfi"]
[pirate-party id="ppfr"]
[pirate-party id="ppgr"]
[pirate-party id="ppgt"]
[pirate-party id="pphr"]
[pirate-party id="pphu"]
[pirate-party id="ppil1"]
[pirate-party id="ppil2"]
[pirate-party id="ppin"]
[pirate-party id="ppis"]
[pirate-party id="ppit"]
[pirate-party id="ppjp"]
[pirate-party id="ppkz"]
[pirate-party id="pplt"]
[pirate-party id="pplu"]
[pirate-party id="pplv"]
[pirate-party id="ppme"]
[pirate-party id="ppmx"]
[pirate-party id="ppnl"]
[pirate-party id="ppno"]
[pirate-party id="ppnz"]
[pirate-party id="pppl"]
[pirate-party id="pppt"]
[pirate-party id="ppro"]
[pirate-party id="ppru"]
[pirate-party id="ppse"]
[pirate-party id="ppsi"]
[pirate-party id="ppsk"]
[pirate-party id="pptn"]
[pirate-party id="pptr"]
[pirate-party id="ppua"]
[pirate-party id="ppuk"]
[pirate-party id="ppus"]
[pirate-party id="ppuy"]
[pirate-party id="ppve"]

[PeterTheOne]

added in e2a1316 .