OpenLayers information sheet: Add A4 format and German version

[marcjansen]

This PR suggests to add the following two variants of the OpenLayers information sheet

• The original letter version reformatted for A4-format
• A German variant as discussed on the mailinglist here: https://lists.fossgis.de/pipermail/fossgis-talk-liste/2017-August/008753.html (German) /cc @astroidex

I am not 100% sure if we want the language specific variants be in the main repo, but maybe @astroidex can weigh in here as well. I am happy to update this PR if needed.

[astroidex]

• some corrections see screenshot

[marcjansen]

Thanks, will update

[marcjansen]

Ping @astroidex:

I addressed your comments, the current PDF is here https://github.com/marcjansen/osgeo/blob/6f500975b3ecec1ec756329a1bb86fb460b57500/marketing/print/openlayers_a4_de.pdf.

Some notes:

• I have left 'build-tools' in the text, as I couldn't come up with a German word that sounded well
• The previous export missed one sentence wrt performance in the third paragraph, mea culpa
• I have added another paragraph describing the interactions that are possible with OpenLayers (probably somthing that might make sense to vbackport to the en-variant).
• I rephrased two or three sentences

I hope you like my changes, and thanks for the input you provided. If you have more feedback to the current version, just drop it here. If you are fast enough, I will update once again (In case that is needed)

[jodygarnett]

This looks great, can we match the new folder structure - and possibly make a print/de folder :)

[marcjansen]

Thanks for the input @jodygarnett:

I have …

• … rebased this on the latest master
• … moved arround the resources as suggested:
  • new print/de/-folder
  • added the English A4-variant to the eu/-folder
• … left the _de-suffix on the PDF
• … also added the _de.sla to a new dedicated de/-folder in the collateral/-folder

It'd be nice if you could please take another look.

[jodygarnett]

Thanks! Happy to merge, thanks for so quickly updating.

I am going to use this as an example for discussing folder structure with the marketing list:

• print/eu - for a4 and similar
• print/us - for letter
• print/de - for german

I do not know if this is a good idea; it is more work but it may result in an easier time directing people to a folder of suitable materials they can just grab and print.