edited the style of README
edited the style of README

Jie317/RepVectorielleDeMots,Jie317/RepVectorielleDeMots,Jie317/RepVectorielleDeMots,Jie317/RepVectorielleDeMots,Jie317/RepVectorielleDeMots,Jie317/RepVectorielleDeMots,Jie317/RepVectorielleDeMots