Remove panic from unmarshal for invalid datatypes.
AddResource returns an error on invalid init.
Post with multiple structs will now error.
Update doc message.
Remove all panics from repository
Add one additional test for PUT.
Revert "AddResource returns an error on invalid in"

This reverts commit 458a9ad34b3da5d3db025101caa3a6efeabb91d5.
Merge pull request #26 from univedo/cleanup

Remove panic from unmarshal for invalid datatypes.