implementing redirection
Merge with http branch
Merge branch 'httpredirection' of github.com:jorjuela33/NGeen into httpredirection

Conflicts:
	.DS_Store
Created session manager to replace nsurlconnection TODO: tests, return cached response and validate some authentications
Added auth challenge TODO: chain certificates
Added function to get the progress of a task in the apiquery
Added example of upload and download task on the readme
added tests for session manager
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Added info to the documentation
Merge pull request #16 from jorjuela33/sessionmanager

Sessionmanager