Add missing license header.
Move share logic out of comute.rb into core.rb.  Fix bug in compute tags references method.
Add initial Network requests and models.

Add requires :id to some Network methods.

Add by_name method to Datacenters collection.

Change object mask on vm get requests.

Change object mask on vm get requests.

Add interface to specify VLAN[s] when creating a server.

Add mocks and tests for Network requests.
Fix Network tagging.
Update Compute examples doc.  Add Network examples doc.

Fix typographical omissions in example documents.

[skip ci]
Update Tag examples doc.

[skip ci]
Update Compute example doc.
Add missing license headers. Cleanup some whitespace.
Merge pull request #10 from softlayer/vlan

Network Support