Document changes for v0.5.1 release
Document changes for v0.5.1 release

kidaa/luvi,joerg-krause/luvi,virgo-agent-toolkit/luvi,joerg-krause/luvi,luvit/luvi,zhaozg/luvi,virgo-agent-toolkit/luvi,brimworks/luvi,luvit/luvi,zhaozg/luvi,brimworks/luvi