skip external relationships in RelationshipsPart.getRel()

attempting to invoke the method getRel() in the presence of external
relationships will always result in an IllegalArgumentException
thrown by org.docx4j.openpackaging.URIHelper.resolvePartUri
In Anchor and Inline as in their child graphicData there can be
reference to hyperlink and dito relationId. This can be found by the
TraversalUtil now..
Prevent malformed uri exception when supplying a file path with no protocol. Fixes #26
Merge pull request #30 from tstirrat/issue_26

Prevent malformed uri exception. Fixes #26
Merge pull request #28 from vollewijn/master

Extending TraversalUtil a little bit to find CTHyperlink in GraphicData
Merge pull request #23 from fmmfonseca/skip_external_relationships

skip external relationships in RelationshipsPart.getRel().
TMP FIX (since in principle, you should be able to get an external rel)
support table row height in PDF output
Merge branch 'master' of https://github.com/plutext/docx4j
refresh the document model, so it can know about
headers/footers added programmatically
Bug (in 2.8.1) fix: tr/tc finder, don't look in nested table.
Preserve the formatting of the rest of the paragraph content.
First approach to improve margin transformation from docx to pdf
Merge pull request #32 from meletis/master

Paragraph format is lost when the paragraph contains a MERGEFIELD.
Merge pull request #33 from jlesquembre/upstream

PDF output: improved margin handling
Header and footer keep the layout as applied after PDF conversion
Code refactored
Handle top position with and without header
Added XmlRootElement annotation that was causing an Exception when attempting to write an Excel spreadsheet to a disk file. In this use case, the spreadsheet was embedded in a PowerPoint slide as the backing store for a chart.
Merge pull request #34 from jlesquembre/upstream

Header and footer keep the layout as applied after PDF conversion
Revert recent changes. See https://github.com/plutext/docx4j/pull/34
Added sample program to edit an embedded chart in a PowerPoint presentation.

Added a 2 slide PowerPoint presentation with one chart for the chart editing sample program.