Import tests for 1.3 links added
Test and implementation for exporting weapon type in URL. #4
Added tests for the additional slot: weapon2
Added implementation for a weapon2 slot that is hidden per default and not
counted in summaries.
Added export of both weapon and weapon2 with new names
Added tests for weapon swapping
Added implementation for weapon swapping.

Added a new button, SwapWeaponButton in tswcalc.button
Only create a summary for the currently drawn weapon (default primary)
Made the logo text larger and added a slogan
Merge branch 'feature/issue/3' into develop. closes #3
Prepare version 1.3.0