Remove ssh-conf from buildout. The sftp api should do everything necessary.
Remove sftp helper from services. It should go together with other ssh helpers.
Fixes #394.

Fixes the main bug. Do a little more than just fix #394 by refactoring and cleaning up.
fix a minor typo bug in share_helpers
Add ssh key input for users during users creation.
Merge pull request #462 from schakrava/issue#394

Issue#394
add low level helper code to add ssh pub key for a user.
Merge branch 'master' into Mchakravartula-issue#463_add_optional_ssh_keys_for_userCreation
Update user model to store ssh pub key.
Update user api to support ssh pub key.
save public key during post.
Display the SSH key if exists when user try to edit user.
Merge branch 'issue#463_add_optional_ssh_keys_for_userCreation' of github.com:Mchakravartula/rockstor-core into issue#463_add_optional_ssh_keys_for_userCreation
Merge branch 'Mchakravartula-issue#463_add_optional_ssh_keys_for_userCreation'