Add options to display jumping, climbing, and throwing stats

[Angular-Angel]

There are some pretty significant equations to determing these stats. Having the sheet automate that the same way it automates most other things would be very helpful.

[richardwilkes]

I've not looked to see what is actually necessary to compute these values, but can they not be done now via custom attributes?

[richardwilkes]

As of the upcoming v5.4 release, a new function in expressions can be used: skill_level, which will allow jumping to be calculated. Looking at the rules for climbing and throwing, there is nothing specific I believe should be on the sheet itself, since they are all very dependent upon the situation.