* add support for Rimworld 1.6
* add new mod option to disable receiving letters from the orbital traders hub if there is no active comms console on your current map

* fixed a crash happening when trying to use DubsPerformanceAnalyzer's 'Harmony Patches' tab while Call-A-Trader is installed (thanks to @SpacerGorisan for spotting this bug)

* add a hint that silver for payment needs to be inside range of active orbital traders beacon
* some language improvements

* rebuild 1.5 assembly with released rimworld version
* add mod icon

* add support for 1.5

* add 1.3 assembly again

* add option to scale trader cost with colonywealth
* make absolut trader cost range freely selectable

Update to work with rimworld 1.4

* letters now have a configurable timeout (or no timeout if disabled)
* letters can now be postponed so that the player can close the dialog window without beeing forced to react on it (accept or decline) when the letter is opened

* improve handling of unexpected gamestate i.e. no orbital traders available in a game due to cave only mods or stuff like that
* trader letter is now a positive event :)
* minor improvements