Updated README.md for 0.7.0
Updated README.md for 0.7.0

adan830/luacheck,tst2005/luacheck,xpol/luacheck,adan830/luacheck,kidaa/luacheck,mpeterv/luacheck,mpeterv/luacheck,mpeterv/luacheck,tst2005/luacheck,kidaa/luacheck,xpol/luacheck,linuxmaniac/luacheck,linuxmaniac/luacheck,xpol/luacheck