Update v4

Updated the rules a bit:

-Buying items is now easier than paying for services

-Buffed/changed few Skills that i thought were kinda weak

-Added more new items and made some items more unique

-Preparation tokens now have a limit of 3, but +1 is gained at every mission.

-The mission's standart rewards now can range from 2 to 5

-Highligthed the section names of the rules, with red