Fix crash in messages.
Further improvement to transport.
Suppress needless update when natives fortify.
Improve tile cache for old games.
Add missing word
Merge branch 'master' of ssh://git.code.sf.net/p/freecol/git
Defend against comodification.
Clear tile cache for watching players on native settlement removal.
Translation context for some symbols.
Improve goods desynchronization message, it is happening.
Defend against comodification.
Missionary fixes, BR#2694.
Localisation updates from https://translatewiki.net.
Fix Europe price desynchronization.
Allow multiple emigration in a single turn.
(if the colonies can produce enough crosses for that)