Added note to README about contributions
Added note to README about contributions

ches/gb,mopemope/gb,inconshreveable/gb,tbruyelle/gb,constabulary/gb,tianon/gb,tbruyelle/gb,hyper-carrot/gb,Luit/gb,davidkaya/gb,MerlinDMC/gb,mopemope/gb,tianon/gb,davidkaya/gb,hyper-carrot/gb,acasajus/gb,constabulary/gb,URXtech/gb,mopemope/gb,lparkes/gb,guiquanz/gb,inconshreveable/gb,ches/gb,constabulary/gb