Pack paths prefixed by ./

[parkan]

Right now the manifest contains all paths as

QmbFMke1KXqnYyBBWxB74N4c5SBnJMVAiMNRcGu6x1AwQH  f0000120001     ./abcd

This is not consistent with spec (which has just regular relative paths) and makes the file slightly more annoying to parse. Manifest still verifies after removing the prefix so maybe we should remove it?

(this may be idiosyncratic to OS X)

[whyrusleeping]

@parkan Looks the same on linux too, fixing now :)

[whyrusleeping]

@parkan fixed in b63a290