I have made a Discord-server for MineTinker with useful information. It is now also the primary contact to me for bugreports and feature requests. (I think it is easier for all of us to use Discord instead of GitHub)

Join the server now: http://discord.gg/ZEVNKhN

Now here are the changelogs:

Added Knockback-Modifier

Player-Heads now drop when killing a Player with Beheading

Hoes get XP while creating Farmland
Hoes can't break while creating Farmland anymore
Hoes now work with Self-Repair, XP and Power while creating Farmland

Axes get XP while carving logs
Axes can't break while carving logs anymore
Axes now work with Self-Repair and XP while carving logs

Poisonous comes with a MaxLevel-option (it can deal much more damage) (you need to remove Poisonous from the tool and reapply it because of this change for it to work)

Code-optimization
Managed event priorities
Increased version number from a7 to a8