Diggy integration with existing mods (primarily Bobs + Angels)

[linaori]

I never really play with mods so I'm not too familiar with this, but I do know that things such as: ore spawning and biters are often changed in mods. Currently lacking:

• Proper ore control. Already mentioned in Diggy cluster Ore balancing #280 that I'd like an overhaul. Current system lets you change the ore in the config though, as long as it adds up to 1.00 chance total. Ideally I would use the map control to spawn ore (on digging instead of chunk), but I have no idea how to make this
• Biter spawning. Currently the biter chances are 100% vanilla. Perhaps the require can be made dynamic so that other implementations can be configured.

[primedead]

To add angel+bob mod support changed this in diggy ore gen config:

`resource_chances = {
['angels-ore1'] = 0.17,
['angels-ore2'] = 0.17,
['angels-ore3'] = 0.16,
['angels-ore4'] = 0.11,
['angels-ore5'] = 0.11,
['angels-ore6'] = 0.11,
['angels-fissure'] = 0.005,
['coal'] = 0.16,
['crude-oil'] = 0.005,
},

        -- minimum distance from the spawn point required before it spawns
        minimum_resource_distance = {
			['angels-ore1']		= 16,
			['angels-ore2']		= 16,
			['angels-ore3']		= 16,
			['angels-ore4']		= 40,
			['angels-ore5']		= 40,
			['angels-ore6']		= 40,
			['angels-fissure']	= 40,
            ['coal']        	= 16,
            ['crude-oil']   	= 57,
        },`

Haven't looked at biter support yet.

fissure needs value modifier.

new Market items:

• wood
• temperate garden
• swamp garden
• desert garden
• temperate tree
• swamp tree
• desert tree

[linaori]

I've added wood (instead of electric poles) in the market and made it possible to add more liquids with value modifiers in #313.

In #309 someone proposed an idea to change the percentage of ores, to weights, meaning we can calculate the % based on the sum instead of 1.00. This should make it a lot easier to add resources, which I will work on in the near future (unless someone else does)