[TASK] Remove leading backslash in use statement(s)

Change-Id: I5bacaed40ffeecbf0231d41f60643985ab7bcf3a
[FEATURE] Support basic pagination for Node->getChildNodes()

This adds two parameters, $limit and $offset, to the getChildNodes()
method. In this implementation added and removed nodes which
have not yet been persisted can lead to diverging results. This
behavior seems to be acceptable though (for now).

This change set also introduces a Fluid View Helper Widget
which allows for paginating nodes in a template.

Change-Id: I83be69a7115d7a7de76b3955738b7309b2d483ad
[BUGFIX] Make TYPO3CR migration filters work on proxy nodes

When trying to migrate a workspace containing proxy nodes the try to
fetch the node type directly failed. This change adds a check for the
node being a proxy node and adjusts the access accordingly.

Change-Id: I99b56f257e1f0c006432caaf33a56b80da882a37
Merge "[TASK] Remove leading backslash in use statement(s)"
[FEATURE] Paginate widget: throw Page Not Found Exception

This changes the behavior of the Paginate Widget to throw a
PageNotFoundException which results in a 404 HTTP status code
if a page number is requested which does not exist.

Previously the PaginateController would just display the last
page again.

Change-Id: Ie39f55b0454cf5b213acb14af470af17e8e67f3a
Merge "[FEATURE] Paginate widget: throw Page Not Found Exception"