Remove paredit stuff from prelude-common-lisp.el

The paredit backspace override without having paredit-backward-delete-key defined by paredit was breaking slime loading. I commented this out rather than deleting it since I noticed you had just commented out other paredit stuff elsewhere
Merge pull request #351 from capdevc/patch-1

Remove paredit stuff from prelude-common-lisp.el
Remove melpa package from list of default packages
Minor cleanup
When copying the current line discard its newline (fixes #347)
Use helm-projectile directly (fixes #352)
Set sp-cancel-autoskip-on-backward-movement to nil
add setting for editing js.erb files
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  Set sp-cancel-autoskip-on-backward-movement to nil
  Use helm-projectile directly (fixes #352)
  When copying the current line discard its newline (fixes #347)
  Minor cleanup
  Remove melpa package from list of default packages
  Remove paredit stuff from prelude-common-lisp.el