v1.7.0 draft

[GeckoEidechse]

Features:
Add Attrition (#321)
Change default sort method for server browser (#303)

Bugfixes:
Bring frontline spawns more in line with vanilla functionality (#318)
Set dropship models correctly for different teams (#329)

Contributors:
@BobTheBob9 @emma-miler @F1F7Y @GeckoEidechse @taskinoz @warmist