Fix abspath invocation
Fix abspath invocation

Previously, this would have created a '~' directory in the current dir. Now, this resolves homedirs first.
jbarreras/grip,mgoddard-pivotal/grip,joeyespo/grip,joeyespo/grip,ssundarraj/grip,jbarreras/grip,ssundarraj/grip,mgoddard-pivotal/grip