Rename cider command to cider-connect

The new name is more descriptive and symmetric to SLIME's slime-connect.
Remove stuff deprecated in 0.4
Removing dynamic vars for symbol loading
[Fix #515] Prompt passed through 'jump to' functions.
Merge pull request #516 from jonpither/no-vars

Removing dynamic vars for symbol loading.
Removing references to IDO.
Merge pull request #517 from jonpither/removing-ido

Removing references to IDO.
Add a section of minibuffer completion
Correct group names
Add a couple of links to the cider group
Add :package-version attribute to several recently added settings
Enable cider-jack-in on tramp buffers

When using cider-jack-in in a tramp source buffer, starts a remote nrepl
server, and connects to it. By default, sets up an ssh tunnel to the
remote port. This can be controlled using nrepl-connection-endpoint,
which defaults to nrepl-connection-ssh-tunnel.
Merge pull request #489 from hugoduncan/feature/tramp-jack-in

Enable cider-jack-in on tramp buffers
Update README.md's REPL pretty-printing symbols
Merge pull request #519 from itegebo/master

Update README.md's REPL pretty-printing symbols
Output the result from cider-eval-print-last-sexp on a separate line
[Fix #498] Implement scratch buffer functionality
Remove spurious ring-insert in jump-to-def-op
Merge pull request #520 from gtrak/master

Remove spurious ring-insert in jump-to-def-op
Fix a regression introduced in #489 that broke cider-jack-in outside
lein projects