Deployment guide for Phoenix apps using exrm

Closes #1.
Merge pull request #3 from slogsdon/feature/deployment

Deployment guide for Phoenix apps using exrm
remove sockets.md per issue #9
Merge pull request #15 from lancehalvorsen/remove-sockets-file

remove sockets.md per issue #9
tiny changes to the scoped routes and channel routes headers
remove structure page. fixes issue #14
remove topics page. fixes issue #10
Merge pull request #16 from lancehalvorsen/remove-structure-page

remove structure page. fixes issue #14
Merge pull request #17 from lancehalvorsen/remove-topics-page

remove topics page. fixes issue #10
completed repository section details
Merge pull request #18 from Kosmas/master

completed repository section details
fixes suggested by Chris after a read-through
fixes old useages of as: :page, references to page_path, and the plug static route
adding note regarding `mix phoenix.start`