removed unnecessary keywords

updated libgdx-utils to 0.9.1

updated gradle wrapper to 2.6

fixed stupid crash when host processed FixtureCreations...

added an assert

fixed wrong import

fixed typo

fixed memory leak

added ProposingWorld#proposings and fixed destroy methods

added ProposingFixture

less public

reduced code duplication

removed WorldClient#pairPool

fixed concurrent Array#iterator() issue

updated gradle wrapper

updated gradle wrapper

now using libgdx-utils 0.9.1-SNAPSHOT

implemented ProposingBody#setTransform(..), setMassData(..), setType(..), setFixedRotation(..), setActive(..), setAwake(..), setBullet(..), setSleepingAllowed(..), setLinearDamping(..), setAngularVelocity(..)

implemented ProposingWorld#setLinearVelocity(..)

implemented ProposingBody#setAngularDamping(..)