Add a method to retreive the 2i indexes from a model.

Allow models to have indexes attached by returning the indexes map.  Also
add appropriate tests, structured after the other 2i test.
Merge pull request #35 from MJDSys/master

Add a method to retreive the 2i indexes from a model.
Use a seperate new structure for retreiving siblings.

When the model structure contains a slice of some elements,
re-using the same structure for the json decoding cause the same
backing array to be used for each decode.  Thus the decoding
will overwrite the data in previous siblings.  Instead, make a
new structure for each sibling to get the decode process to
allocate a new array.  Also, add a unit test to verify the fix.

Note, byte slices do not appear to exhibit this problem.  Slices
of byte slices do for the first slice.
Merge pull request #36 from MJDSys/SiblingSliceFix

Use a seperate new structure for retreiving siblings.
When fetching an RObject with an explicit client, don't use defaultClient.

When fetching an RObject using an explicit client, the implementation would
use defaultClient to fetch the bucket.  Since defaultClient is uninitialized,
this of course panics later on a nil pointer.  Thus switch to using the client
as passed.  Also add to a test to ensure it won't reappear.
Merge pull request #37 from MJDSys/FixGetFromPanic

When fetching an RObject with an explicit client, don't use defaultClient.
Let Travis use go 1.1
Merge branch 'master' of https://github.com/tpjg/goriakpbc into mr