LONDON — It started more than five years ago as what appeared to be a fairly simple sex crime case: two women in Sweden came forward to accuse Julian Assange of sexual misconduct. [...] the case has mutated into a complicated international drama involving Britain, Sweden, the United States, Ecuador, a host of human rights lawyers and the United Nations. The sex crime allegations came at the height of Assange’s fame as the founder of WikiLeaks, an organization that had made a name for itself by releasing hundreds of thousands of pages of classified government documents. In Sweden, having sex with an unconscious, drunk or sleeping person can lead to a rape conviction punishable by up to six years in prison. A Swedish investigation into the crimes was launched, then dropped for lack of evidence, and then started again as prosecutors sought to question Assange about possible molestation and rape.