Modify pagination as per requirement.
Change naviation icons for prev and next links.
Display entries per page in shares page.
Display the entries per page.
Merge pull request #373 from Mchakravartula/issue#328_pagination

Modify pagination as per requirement.
Merge branch 'issue#320' of https://github.com/schakrava/rockstor-core into schakrava-issue#320
Front end support for SFTP

Modify sftp model and serializer to add share name in serialized data
Add templates, views and routing for sftp pages
Add handler for delete