Updated Buildscript for 1.7

Let the update begin.

Do to the git plugin being weird, it won't install Core correctly from a
different branch, you'll have to manually go into eclipse and change the
location of Core to the 2.1.0 directory.
Buildscript fix.
Buildscript again.

But I'm pretty sure I've got it now.
Removed unnecessary files.

Thanks to the new build setup.
1.7 Update

Not fully tested, but all compile errors have been fixed.
Merge remote-tracking branch 'origin/master' into 1.1.0

Conflicts:
	build.properties
	src/main/java/redgear/brewcraft/common/Brewcraft.java
	src/main/java/redgear/brewcraft/common/BrewcraftCompatibility.java
	src/main/resources/assets/redgear_brewcraft/lang/en_US.xml
Fixed dedicated server code.

Moved TileEntityRender to client side only.
Minor changes.

Just removing a few things.
Added two more potions.

We have the Potion of Cryogenics, a potion that reduces movement speed
of an entity down to next to zero. This includes a Long variant. Brewed
from a snowball (for now.)

Along with this, the Potion of Stability, which reduces the amount of
knockback an entity takes from damage. Long variants. Brewed with the
Obsidian Tear, crafted from a Ghast Tear and obsidian, or found as a
rare drop from Ghasts.

I'll add in the potion icons later, along with the new fluid textures.
Lang files update.
Updated assets.
Fixed splash potions making drinking animation.
Tweaked the Obsidian Tear.

It is now the Plagued Tear, crafting is disabled by default.
Ugh, getting rid of Stability.

Stability, along with Frozen, are effects that mess with
AttributeModifiers, that are very difficult to use. After several
different tries attempting to perfect Stability, I'm concluding that I
can't use AttributeModifiers for potion effects, due to their
instability. No pun intended.
Chinese localization.
Added III-level potions.
Could have sworn I changed that. . .
Added plugins.
Added an achievement plugin.

They all work nicely, might tweak some of the achievement icons later.
Implemented Fireproof effect, buffed Holy Water.