Update: After a long wait, Potato is finally updated to 1.7.5

#1 1.7.5-ready

#2 Because the potatoifications say the Potato-god is compiled in Java 6, we must should do so too.

#3 Update compiler and jar maven plugin.
Merge pull request #32 from DenialMC/master

Update: After a long wait, Potato is finally updated to 1.7.5