Rename Sniper Class to Marksman Class

[Kriegstofu]

Hello,

Since Archer Title Tier 4: Sniper is another word for Sharpshooter (Xbow Tier 4), it would be nice to rename it to Marksman Class to avoid misleading of
usability of items (which are usable by more than 1 Class (for example archer, longbowman, infantry, ...)

and like in Native, Sharpshooters are Swadian Elite Ranged Units and Marksman Elite (Vaegir) Archers