put string ids in workflow info DAGs
Merge pull request #4 from nsoranzo/objects

Add examples to compare Galaxy and bioblend.objects API.
Merge branch 'objects', remote-tracking branch 'origin/objects' into objects
updated W5_galaxy_api example
objects examples: bug fix
TestGalaxyObjects: minor fix
object wrappers: added ContentInfo types
added selection by name to get_datasets
fixed docs and tests
WorkflowInfo: added JSON loading of tool_inputs
updated W5_bioblend.objects example
updated examples
added W2 example
Add W3 example.