Merge branch 'release/2.1.18' into develop
[Build] Pushing resource version to 2.1.18-SNAPSHOT
Merge branch 'master' into develop
[Client] Updating some texts
[easyNPC] Fixed build system (grammar build)
[easyNPC] Update Lua output to use local requires

This should be written in a nicer way, so that you won't have to deal with underscores in module names.
[Client] First minor improvement to text and inform display
[libGDX-Input] Support for entering ALT-Keycodes
[Client] Changes at displaying chat bubbles
Merge remote-tracking branch 'Illarion/develop' into develop
[Engine-libGDX] Changed handling of alt+numpad values
[Client] Chat bubble tracks avatar

The speech bubble is now staying over the walking avatar even if it
moves.
[Client] Don't update the chat bubble position if the avatar is invalid
[Client] Only display "..." in the bubbles in case NPCs are talking
[Client] Hide older message bubbles in case they overlap a newer one
[Engine-Nifty] Forward events properly if the alt key is pressed
[Client] Tried to improve the logging output during the walking
[Client] fixes #10477 Crash in NetComm

Access problems to the network interface from the keep alive timer
should be fixed with this commit.
[Nifty-Controls] Left align text in message dialogs
[Nifty-Style] Changes required for the new progress bar background