Remove Gson

[Andre601]

Pull Request

Type

• Internal change (Doesn't affect end-user).
• External change (Does affect end-user).
• Wiki (Changes towards the Wiki).
• Other: __________

Description

I made this PR now to finally get this rolling.
As described in #477 does PAPI have a chance of messing up bStats which may or may not break stats of all the other plugins that use bStats.
From what I gathered in the issue is the problem the relocated gson and the only reason gson is there is because of 1.7 support.

I say fuck 1.7! That version doesn't have any real reason to be supported on our end and finding a complicated solution (like making a separate jar... why?) just to still support it is imo not good at all.

This is a draft to keep a sort of discussion running so that we can (finally) decide on a solution. If there is a better solution without making PAPI too overcomplicated in terms of maintenance should this be mentioned.
I may open this for merge once we finally go to a proper point but my opinion is to finally drop 1.7 support. It's not worth the trouble in any way.

Closes #477

[Andre601]

@darbyjack @extendedclip @PiggyPiglet Any input on this? Should we just drop 1.7 support? I think that really is the best option here.