V3.5 + 3.6: Use correct cache dir for caching tiles

[uckelman]

Call Info.getCacheDir() to get the cache dir if Info.getCacheDir() exists to be called. (I.e., we are running in Vassal 3.6+.) If not, call Info.getConfDir(), for Vassal 3.5.

This patch targets both Vassal 3.5 and 3.6. Patch #1048 should be applied when you're ready to do a release based on 3.6.

[derimmer]

@uckelman - checking to be sure I understand this properly.

Release of VASL6.6.4 is planned for next spring and it will be based on 3.6 (or whatever is the latest by then). So for that release I need to apply Patch #1048?

Do we need to issue a new version of the current VASL mod 6.6.3 using this Patch #1049? Can we just wait until the spring or will users experience errors when using 6.6.3 with either 3.5.8/3.6?

[uckelman]

Yes, #1048 is for the a VASL release where you want the minimum Vassal version to be 3.6. I presume that will be the planned spring one.

I would appreciate it if you could do a release with this patch (#1049) as soon as possible.
VASL 6.6.3 isn't able to load board tiles in Vassal 3.6, so is completely unusable, and we'll have endless complaints if there's no usable VASL release until spring.

[derimmer]

Will do.