[Widelands-dev] [Merge] lp:~widelands-dev/widelands/frisian-buildings into lp:widelands

Continuous integration builds have changed state: Travis build 4153. State: passed. Details: https://travis-ci.org/widelands/widelands/builds/443117571. Appveyor build 3950. State: success. Details: https://ci.appveyor.com/project/widelands-dev/widelands/build/_widelands_dev_widelands_frisian_bu

[Widelands-dev] [Merge] lp:~widelands-dev/widelands/frisian-buildings into lp:widelands

Benedikt Straub has proposed merging lp:~widelands-dev/widelands/frisian-buildings into lp:widelands. Commit message: Improved graphics for the frisian sentinel Requested reviews: Widelands Developers (widelands-dev) Related bugs: Bug #1764606 in widelands: "Frisian building models are too d