Introduce latest MumbleLink changes

[dlamkins]

Jonagar has exposed additional details to the MumbleLink API:

• uint processId
• byte mountIndex
• IsInCombat flag (bit 7) to the uiState

A way to set the name of the MumbleLink target has also been provided: -mumble <name> which means that when creating a new mumblelink client within Gw2Sharp it will require the name of the target we wish to connect to.

Mount index matches the enum:

enum MountType : byte
{
    None,
    Jackal,
    Griffon,
    Springer,
    Skimmer,
    Raptor,
    RollerBeetle,
    Warclaw,
    Dragon,
};

REF: https://discordapp.com/channels/384735285197537290/694129718689005619/704727573112029264