Implement decimal numbers in rates multipliers

[RecoX]

add Codigo*

Implement the changes: Make the necessary modifications as per the task requirements.

Preserve existing code: Ensure that no other parts of the code are modified except for those required to complete this task.

The rates multiplier needs to accept decimal numbers, so we can increase the difficulty on the game at a global level. We need to accept numbers like 0.2

ExpMult=3
OroMult=1
RecoleccionMult=2

These are the properties that needs to accept this values.