added IHttpRequest interface and two implementations
new file:   PoIInterface/PoIInterface/HttpRequestMock.cs
new file:   PoIInterface/PoIInterface/HttpRequestUnity.cs
new file:   PoIInterface/PoIInterface/IHttpRequest.cs

removed unused namespaces
modified:   PoIInterface/PoIInterface/PoI/Location.cs
modified:   PoIInterface/PoIInterface/PoI/PoIInfo.cs
modified:   PoIInterface/PoIInterface/PoI/PoIInfoMethods.cs
modified:   .gitignore: excludes unity meta files