update cloud_config with instructions on required changes and add network.md, correct links in quick_start
clean up formatting
attempting in document relative link
adding one more hint for fusion users
Update coreos_cloud_config.md

Correcting relative link
Update networking.md

adding @jeinwei's experiences
Move handler setup: cmd/apiserver -> pkg/master

Moved CORS handler setup and authorizer setup.
Will allow for integration test of authorization.
Turn on node constraint scheduling.
Merge pull request #2005 from erictune/master_integ_test

Move handler setup: cmd/apiserver -> pkg/master
Merge pull request #1784 from JaysonRaymond/master

CoreOS Getting Started Guide: should specify required cloud-config changes #1770
Merge pull request #2007 from brendandburns/scheduler

Turn on node constraint scheduling.
Merge pull request #2010 from brendandburns/fix

Fix the e2e tests and kubecfg given recent additional validation.
Further fixes.