An Open-Label, Randomized, Multi-Site Study to Assess the Pharmacokinetics of Single Subcutaneous Injections of 16mg and 64mg of GSK716155 Administered at Three Different Injection Sites in Adult Male and Female Subjects with Type 2 Diabetes and of Single Subcutaneous Injections of 16mg and 64mg of GSK716155 Administered in the Abdomen of Healthy, Normal Volunteers