Dying is too easy in this city, and neither death nor we should be proud. Even before summer officially arrives, nearly 90 people have been slain. Sages of street life here, anti-violence crusaders like the Rev. Willie E. Ray, forecast long hot deadly days ahead. They point to unresolved conditions that breed such contempt for life that even the slightest thing prompts a violent response. The litany is familiar: joblessness, poverty, broken families, poor education, poor housing, inadequate recreation facilities, too few after-school programs.