NAIROBI (Reuters) - Every day, Kagonya Awori and her tech-savvy team trawl through Facebook and Twitter for warning signs that Kenya's elections in March may unleash the same ethnic violence that took the country to the brink of civil war five years ago. Sifting through blogs and social media sites, the group of six search for hate speech and inflammatory postings - or any early indications that inter-tribal tensions are escalating. Awori and her colleagues have reason to be worried. ...