Add Data Import/Export (#31)

* Add schedule tasks

* Add initial data import / export

Author: SebastianPrehn

docs/index.rst

@@ -27,6 +27,7 @@ ERDA/SIF: User Guides
    sections/erda/seafile/index
    sections/erda/archiving/index
    sections/erda/scheduletask/index
+   sections/erda/dataimportexport/index
 
 .. toctree::
    :maxdepth: 2

docs/sections/erda/dataimportexport/index.rst

@@ -0,0 +1,35 @@
+.. _erda-dataimpexp-start:
+
+Data Import/Export
+==================
+
+We offer the ability to import and export data from ERDA in an efficient way.
+Typical scenarios include fetching big data sets from dedicated Linux/UNIX servers or from imaging sites, where data are recorded on-site with remote access afterwards.
+This is probably mostly relevant for users with a certain experience in handling big data sets.
+
+ERDA comes with low-level background import and export of data through different efficient transfer protocols like SFTP/FTPS/RSYNC/HTTPS and WebDAVS.
+
+From the **Files** page you can right-click in the file manager and in the menu under *Data Transfers* you can find *Import* and *Export*.
+
+There is also the dedicated page. The corresponding navigation menu entry is not shown by default to keep it simple,  but you can **Add** it to your home page, which you can read more about on <erda-homepage-start>`_.
+
+On the **Data Transfers** page you can create an external data transfer and either import or export data via a handy form.
+
+
+.. _erda-dataimpexp-transfer:
+
+External Data Transfer
+----------------------
+
+Select whether you want to import or export data via **Action**, and (optionally) give it a transfer ID / name to recognize it by.
+
+Select **Protocol**, and specify **Host and port**.
+
+Choose your **Login method** and specify the **Source path(s)**, clicking on the button *Add another source field* in case you have several **source paths**.
+
+Add **Destination path** and **Exclude path(s)**.
+
+If you transfer from a slow site, you should set **Enable compression**, and otherwise make sure it is unset.
+
+You can specify your mail for a notification on completion, and then click **Request transfer**.
+