Basically, what the title says.
Seems like Angel has made quite a few rearrangements in how technologies are unlocked. He adds a few new while removing some of the old ones. Also, there has been quite a bit of rebalancing by changing the what researches unlock what and how much the researches cost.
The new beta version of the smelting mod isn't yet in mod portal but the mods depending on that new version are. Basically, if someone wants to use the newer versions of some of the angel's mods from the portal, they'll have to manually download and install this version of smelting:
https://github.com/Arch666Angel/angelsores/releases/download/0.12.1_test/angelssmelting_0.2.1.zip
